The M12 Fuel Hackzall stands out as a remarkably versatile and powerful compact reciprocating saw, offering a compelling blend of portability and performance for professionals and DIY enthusiasts alike.

It’s a must for those tight spaces and quick cuts where a full-size saw is overkill or simply won’t fit, delivering surprising power for its size thanks to Milwaukee’s FUEL brushless motor technology.

This tool excels in tasks like cutting through PVC, copper pipes, threaded rod, conduit, and even dimensional lumber, making it an indispensable addition to any toolkit focused on efficiency and convenience.

Its lightweight design and ergonomic grip significantly reduce user fatigue, allowing for extended use without sacrificing control or precision.

Here’s a breakdown of some top reciprocating saws, including the Hackzall, to give you a clearer picture of the market:

Milwaukee M12 FUEL Hackzall Reciprocating Saw 2520-20
- Key Features: Compact and lightweight design, POWERSTATE brushless motor, REDLINK PLUS intelligence, variable speed trigger, LED light.
- Average Price: $149 tool only
- Pros: Excellent power-to-weight ratio, ideal for one-handed use, great for tight spaces, durable, long battery life with M12 XC batteries.
- Cons: Not suitable for heavy-duty demolition or very thick materials, battery sold separately.
Milwaukee M18 FUEL Sawzall Reciprocating Saw 2720-20
- Key Features: Full-size reciprocating saw, POWERSTATE brushless motor, REDLINK PLUS intelligence, adjustable shoe, anti-corrosion blade clamp.
- Average Price: $249 tool only
- Pros: Extreme power for demolition and heavy-duty cuts, durable, fast cutting, excellent for a wide range of materials.
- Cons: Heavier and larger than the Hackzall, less maneuverable in tight spaces, higher price point.
DEWALT 20V MAX XR Reciprocating Saw DCS367B Make Money To Money
- Key Features: Compact design, brushless motor, 4-position blade clamp, variable speed trigger, LED light.
- Average Price: $179 tool only
- Pros: Good balance of power and portability, versatile blade positioning, part of a broad 20V MAX XR system, durable.
- Cons: Slightly heavier than the Hackzall, not as compact for extremely tight spots, battery sold separately.
Ryobi ONE+ HP 18V Brushless Compact Reciprocating Saw PCL515B
- Key Features: Compact and lightweight, brushless motor, pivoting shoe, variable speed trigger, part of the ONE+ system.
- Average Price: $129 tool only
- Pros: Affordable entry into the brushless compact saw market, wide range of compatible batteries, good for general household tasks.
- Cons: Not as powerful or robust as professional-grade options, blade changes can be less intuitive.
Makita 18V LXT Sub-Compact Brushless Recipro Saw XRJ07ZB
- Key Features: Sub-compact design, brushless motor, variable speed, electric brake, LED light.
- Average Price: $159 tool only
- Pros: Excellent ergonomics and balance, very lightweight for an 18V tool, strong performance for its size, robust build quality.
- Cons: Battery and charger sold separately, can be pricey for the full kit.
Bosch 12V Max Reciprocating Saw GSA12V-08N
- Key Features: Extremely compact and lightweight, variable speed trigger, LED light, tool-free blade change.
- Average Price: $109 tool only
- Pros: Unbeatable for tight spaces, incredibly light, perfect for small tasks and overhead work, excellent control.
- Cons: Less powerful than the Hackzall, smaller stroke length, not for demanding applications.
CRAFTSMAN V20 RP Compact Reciprocating Saw CMCS300B
- Key Features: Compact design, variable speed trigger, tool-free blade change, contoured overmold handle.
- Average Price: $99 tool only
- Pros: Very affordable option, part of the CRAFTSMAN V20 system, decent performance for light to medium tasks.
- Cons: Brushed motor less efficient than brushless, not as robust or powerful as professional-grade compact saws.

Table of Contents

The Powerhouse in Your Palm: Decoding the M12 Fuel Hackzall’s Performance

When you talk about the M12 Fuel Hackzall, you’re really talking about a marvel of compact engineering. This isn’t just another battery-powered saw. it’s a testament to how far cordless tool technology has come, packing a surprising punch for its diminutive size. The core of its performance lies in Milwaukee’s proprietary technologies: the POWERSTATE brushless motor and REDLINK PLUS intelligence. These aren’t just fancy marketing terms. they’re the reasons this tool consistently outperforms competitors in its class.

The Magic of the POWERSTATE Brushless Motor

Think of the motor as the heart of any power tool.

Traditional brushed motors rely on carbon brushes to transfer current, which inevitably wear out, create friction, and generate heat.

A brushless motor, like the POWERSTATE in the Hackzall, eliminates these brushes entirely.

Increased Efficiency: Without brushes, there’s less friction and heat loss, meaning more of the battery’s energy is converted into actual cutting power. This translates to longer runtimes per charge.
Extended Tool Life: No brushes to wear out means fewer consumable parts and less maintenance. The motor runs cooler, further prolonging its lifespan. This is huge for pros who rely on their tools daily.
More Power and Torque: Brushless motors can deliver higher torque and speed in a more controlled manner. For the Hackzall, this means it can tackle tougher materials that would bog down a less advanced compact saw.

The Brains Behind the Brawn: REDLINK PLUS Intelligence

If the POWERSTATE motor is the heart, then REDLINK PLUS is the brain.

This advanced electronic system constantly monitors communication between the battery, motor, and charger, optimizing performance and protecting the tool from overload. Garage Gym Reviews Barbell Collars

Overload Protection: Imagine pushing a saw too hard into a tough piece of material. Without REDLINK PLUS, the motor could burn out. With it, the system senses the stress and cuts power momentarily, preventing damage. This is a critical feature for tool longevity and safety.
Optimized Performance: REDLINK PLUS ensures the tool operates at its peak efficiency for any given task. It adjusts power output based on the load, preventing wasted energy and maximizing cuts per charge.
Thermal Management: Power tools generate heat, especially under heavy use. REDLINK PLUS actively monitors the tool’s temperature, shutting it down or reducing power before heat can damage internal components. This is why you can push the Hackzall harder for longer.
Individual Cell Monitoring: Within the battery pack, REDLINK PLUS monitors each individual cell. This ensures balanced charging and discharging, which extends the overall lifespan of the battery itself. You’re getting the most out of your battery investment.

Stroke Length and Strokes Per Minute SPM: What They Mean for Your Cuts

When evaluating any reciprocating saw, two key specifications are stroke length and strokes per minute SPM. These directly impact how quickly and efficiently the tool can cut.

Stroke Length: This refers to how far the blade moves back and forth with each stroke. The M12 Fuel Hackzall typically features a 1/2-inch stroke length. While this might seem small compared to a full-size Sawzall’s 1-1/8-inch stroke, it’s perfectly optimized for the Hackzall’s intended use.
- Benefit 1: Control: A shorter stroke length offers more control, especially in delicate or precise cutting tasks. You’re less likely to overcut or damage surrounding material.
- Benefit 2: Material Removal: For materials like copper, PVC, and conduit, a 1/2-inch stroke is more than sufficient to clear debris efficiently without excessive vibration.
- Benefit 3: Compactness: A shorter stroke allows for a more compact gearbox design, contributing to the Hackzall’s overall small footprint.
Strokes Per Minute SPM: This measures how many times the blade completes a full back-and-forth cycle in one minute. The Hackzall boasts a variable speed trigger, allowing users to control the SPM up to 3,000 SPM.
- High SPM e.g., 3,000 SPM: Ideal for fast cutting through softer materials like wood, plastics, and drywall. The rapid motion ensures quick material removal and a clean cut.
- Low SPM e.g., controlled by trigger: Essential for cutting metals or harder materials where excessive speed can generate heat, dull blades quickly, or even cause kickback. Slower speeds give you more control and extend blade life.
- Variable Speed Trigger: This is a crucial feature. It means you’re not stuck with one speed. You can feather the trigger to start cuts slowly and precisely, then ramp up to full speed as needed. This adaptability is key to the Hackzall’s versatility across different materials.

In essence, the combination of the POWERSTATE brushless motor, REDLINK PLUS intelligence, a precise stroke length, and a high, variable SPM makes the M12 Fuel Hackzall a surprisingly capable tool for a wide array of cutting applications.

It’s not designed to be a demolition brute, but within its niche of fast, controlled cuts in tight spaces, it’s a true champion.

Ergonomics and User Experience: Comfort in Your Hand

The true test of a compact tool isn’t just its power.

It’s how it feels in your hand after an hour of use.

The M12 Fuel Hackzall shines brightly in the ergonomics department, making it a favorite for professionals who spend all day with tools.

Milwaukee has clearly put a lot of thought into how users interact with this saw, and it pays dividends in reduced fatigue and improved control.

The Magic of One-Handed Operation

One of the most touted features of the Hackzall is its ability to be used with one hand. This isn’t just a marketing gimmick. it’s a genuine game-changer in many scenarios. Robot Vacuum Cover

Access in Confined Spaces: Imagine cutting a pipe deep under a sink or a piece of conduit within a wall cavity. Often, you only have one hand free to operate the tool while the other might be holding material, bracing yourself, or even shining a light. The Hackzall’s balanced design and light weight often around 3.5 lbs with a compact battery make true one-handed use feasible.
Overhead Work: Working overhead with a heavy, two-handed reciprocating saw is a quick path to shoulder and arm fatigue. The Hackzall’s lightness means you can make several overhead cuts before needing a break, increasing your productivity.
Increased Maneuverability: Being able to pivot and manipulate the saw with one hand allows for much finer control, especially when making awkward or intricate cuts. This translates to cleaner results and less wasted material.
Safety: While two-handed operation is always recommended where possible for maximum control, the Hackzall’s design makes it safer for those times when a second hand simply isn’t an option. Its low vibration and good balance reduce the risk of losing control.

Weight and Balance: A Feather in Your Hand

The M12 Fuel Hackzall is remarkably lightweight, especially when paired with a compact M12 REDLITHIUM battery. This isn’t just about making it easy to carry. it fundamentally impacts user experience.

Reduced Fatigue: Less weight means less strain on your wrists, arms, and shoulders over extended periods. This is critical for tradespeople who use their tools for hours on end. A lighter tool means you can work longer, more comfortably, and with less risk of repetitive strain injuries.
Improved Control: A well-balanced tool, even a lightweight one, feels more stable and predictable. The Hackzall’s weight distribution, even with a battery attached, is excellent, making it feel like an extension of your arm rather than a cumbersome appendage.
Portability: Obviously, a lighter tool is easier to transport, whether you’re carrying it in a tool bag, climbing a ladder, or navigating a crowded job site.

Grip and Handle Design: Where Comfort Meets Control

The handle of a power tool is your primary point of contact, and its design dictates much of the user’s comfort and control.

Milwaukee has outfitted the M12 Fuel Hackzall with an ergonomic grip that stands out.

Contoured Design: The handle is typically molded to fit the natural curve of the human hand, reducing pressure points and providing a secure, comfortable hold.
Rubber Overmold: A high-quality rubber overmold is crucial. It provides:
- Enhanced Grip: Even with sweaty hands or gloves, the rubber overmold ensures you maintain a firm, non-slip grip.
- Vibration Absorption: The rubber material helps to dampen vibrations generated during cutting, further reducing user fatigue and making the tool more pleasant to operate. Reciprocating saws inherently vibrate, so any mitigation is welcome.
- Durability: The overmold also adds a layer of protection to the tool’s housing, making it more resistant to drops and impacts on the job site.
Trigger Placement and Sensitivity: The variable speed trigger is strategically placed for easy access and offers excellent sensitivity. This allows for precise control over the cutting speed, from a slow start for accuracy to full throttle for rapid material removal. The ability to feather the trigger is critical for diverse applications.

In summary, the M12 Fuel Hackzall isn’t just powerful. it’s smart about how it delivers that power.

Its focus on one-handed operation, lightweight design, superb balance, and a meticulously crafted ergonomic grip makes it a joy to use.

This attention to user experience is precisely why it’s become a staple in many professionals’ toolkits, making challenging cuts far less fatiguing and much more manageable.

Versatility and Applications: Beyond the Obvious Cuts

One of the Hackzall’s strongest selling points is its remarkable versatility.

While it might look like a scaled-down Sawzall, its specific design and capabilities open up a host of applications where larger, heavier saws are simply impractical or overkill.

It’s the kind of tool that, once you have it, you’ll wonder how you ever managed without it.

Common Cutting Tasks and Materials

The M12 Fuel Hackzall excels at a range of common cutting tasks found in various trades. Tired And Cant Sleep

Its compact size allows it to get into spaces where traditional reciprocating saws or even hacksaws would struggle.

Plumbing:
- PVC/ABS Pipe: This is arguably one of the Hackzall’s most common and efficient uses. It makes clean, fast cuts through various sizes of plastic pipe found in drain, waste, and vent DWV systems. Whether you’re roughing in new plumbing or making repairs, the Hackzall slices through these with ease.
- Copper Tubing: With the right blade, it makes quick work of copper pipes, from small diameter lines to larger supply lines. This is a huge time-saver compared to manual tubing cutters, especially in tight areas.
- PEX Tubing: While specialty PEX cutters exist, the Hackzall can effectively cut PEX, particularly when dealing with existing runs or larger diameter PEX.
- Small Cast Iron with specific blades: For small diameter cast iron drain pipes, particularly in repair scenarios, a carbide-tipped reciprocating saw blade on the Hackzall can surprise you with its capability. It’s not for full demo, but for quick, precise cuts in tight spots, it’s viable.
Electrical:
- EMT/Rigid Conduit: Ideal for cutting conduit for electrical runs. Its compact size is perfect for working within wall studs, ceiling joists, or overhead.
- Threaded Rod: A common task for electricians and HVAC installers. The Hackzall, with a metal-cutting blade, makes clean cuts through threaded rod, often quicker and safer than using a grinder or bolt cutters, especially if you need to maintain thread integrity.
- Unistrut/Strut Channel: While heavier gauge strut might prefer a larger saw, the Hackzall can handle lighter gauges or make quick adjustments to existing runs.
- Jacketed Cable: Efficiently cuts through various types of jacketed electrical cable for rough-ins or modifications.
HVAC:
- Ductwork Sheet Metal: With a fine-tooth metal-cutting blade, the Hackzall can be used for rough cuts in sheet metal ductwork, especially for making penetrations or modifications in existing systems.
- Small HVAC Pipes: Similar to plumbing, it handles various small diameter pipes used in HVAC systems.
Carpentry/Remodeling:
- Dimensional Lumber 2×4, 2×6: While not a framing saw, it can cut through standard 2x lumber for quick adjustments, blocking, or rough openings, especially in tight or awkward angles. It’s great for trimming off stud ends or removing blocking.
- Plywood/OSB/Drywall: Effective for making rough openings for windows, doors, or access panels, or for quickly removing sections of material during demolition or renovation.
- Nail-Embedded Wood: With the appropriate bi-metal blade, it can cut through wood with embedded nails, making it useful for demolition or removal tasks where nails are present.
General Purpose:
- Demolition Light: Think about removing old window frames, cutting out sections of drywall, or dismantling small structures where precision is secondary to speed in a confined area.
- Landscaping Small Branches: For quick pruning of small branches or roots that are too large for hand pruners but don’t warrant a chainsaw.

Niche Applications Where the Hackzall Shines

Beyond the common tasks, the Hackzall truly differentiates itself in specific scenarios where its unique attributes become indispensable.

Overhead Work: Any task requiring you to hold a saw above your head for extended periods e.g., cutting overhead conduit, removing old ceiling joists, trimming tree branches benefits immensely from the Hackzall’s light weight and one-handed operation. Your arms will thank you.
Tight Spaces: This is perhaps its greatest strength.
- Inside Wall Cavities: Cutting pipes or wires within stud bays.
- Under Sinks/Cabinets: Plumbing repairs or installations.
- Crawl Spaces/Attics: Navigating extremely confined areas.
- Between Joists/Rafters: Running new lines or making cuts in structural members.
Awkward Angles: The ability to manipulate the saw with one hand allows you to make cuts from unusual angles that would be impossible with a larger, two-handed tool. This is common in remodeling and repair work.
Emergency Cuts: Its rapid deployment and ability to cut through various materials make it valuable for quick emergency cuts, whether it’s freeing a stuck item or making a fast access point.
Precision Rough Cuts: While not a precision finishing tool, for “good enough” rough cuts where a clean line isn’t paramount but access is, the Hackzall performs admirably. For example, cutting out a section of subfloor for access or trimming a door jamb during installation.
Material Prep: Quickly cutting stock materials like threaded rod or PVC pipe to length before installation, saving time compared to manual methods.

The key to unlocking the Hackzall’s full potential lies in selecting the right blade for the material.

With a diverse range of reciprocating saw blades available for different materials and applications wood, metal, demolition, bi-metal, carbide-tipped, the Hackzall transforms from a specialized tool into a truly multi-purpose workhorse.

Its compact size, combined with its surprising power, makes it an indispensable tool for anyone facing cuts in challenging environments. Best Can

Battery Life and Power Systems: The M12 Ecosystem Advantage

The M12 Fuel Hackzall’s performance isn’t just about the tool itself.

It’s intricately linked to Milwaukee’s robust M12 REDLITHIUM battery platform.

This ecosystem provides a significant advantage, offering users flexibility, extended runtimes, and smart power management.

Understanding the different battery options and how they interact with the Hackzall is key to maximizing your productivity.

The M12 REDLITHIUM Battery Lineup

Milwaukee’s M12 battery system is designed for compact tools, offering a balance of power and portability.

For the Hackzall, you’ll typically be looking at two main types of M12 batteries:

M12 REDLITHIUM CP Compact Pack Batteries: These are the smaller, lighter batteries, typically found in 1.5 Ah, 2.0 Ah, and 2.5 Ah capacities.
- Pros: Extremely lightweight, make the Hackzall incredibly nimble for one-handed overhead work, and ideal for quick tasks where maximum runtime isn’t critical.
- Cons: Shorter runtimes, meaning more frequent battery changes for extended use.
- Best For: Overhead cuts, quick plumbing repairs, light electrical work, tight access.
M12 REDLITHIUM XC Extended Capacity Batteries: These are larger, higher-capacity batteries, commonly available in 3.0 Ah, 4.0 Ah, 5.0 Ah, and 6.0 Ah capacities.
- Pros: Significantly longer runtimes, allowing you to complete more cuts on a single charge. Provide more sustained power for tougher materials.
- Cons: Add noticeable weight and bulk to the Hackzall, potentially reducing the one-handed feel.
- Best For: Longer cutting sessions, repetitive tasks, cutting denser materials, general construction where battery changes need to be minimized.

The Synergy with REDLINK PLUS Intelligence

As discussed, the REDLINK PLUS intelligence system is the brain of the operation, optimizing the interaction between the battery and the tool.

Optimized Power Delivery: REDLINK PLUS constantly monitors the battery’s charge level and the tool’s power demand, ensuring the Hackzall gets the precise amount of power it needs without wasting energy. This translates directly to more cuts per charge.
Battery Protection: The system prevents over-discharge, overheating, and overloading of the battery, significantly extending its lifespan. This is a crucial investment protection, as batteries can be a significant cost over time.
Fuel Gauge: Most M12 REDLITHIUM batteries feature a built-in LED fuel gauge. This simple but invaluable feature allows you to quickly check the remaining charge with the press of a button, preventing unexpected power loss in the middle of a job.

Real-World Battery Performance Expectations

Predicting exact battery life is tricky because it depends heavily on the application, material, blade type, and user technique. However, here are some general expectations: Cross Trainer Work Out

Light-Duty e.g., cutting PVC, small wood branches: With a 4.0 Ah XC battery, you can expect to make dozens, if not hundreds, of cuts. Many users report being able to work for hours on light tasks before needing a recharge.
Medium-Duty e.g., cutting EMT conduit, 2x4s: With a 4.0 Ah XC battery, you’ll likely get a solid 30-60 minutes of continuous cutting time, or numerous discrete cuts over a longer period.
Heavy-Duty e.g., cutting threaded rod, demo with nails: For more demanding tasks, the battery will drain faster. A 4.0 Ah XC battery might give you 15-30 minutes of aggressive cutting, necessitating a swap to a fresh battery if you have a lot to do.

Pro Tip: Always have at least two batteries, especially the XC packs, charged and ready. This ensures continuous workflow and minimizes downtime on the job site. A 4.0 Ah or 6.0 Ah XC battery is generally recommended as the primary choice for the Hackzall to get the best balance of runtime and power delivery, while a smaller CP battery might be handy for very specific, ultra-lightweight tasks.

The Charging Ecosystem

Milwaukee’s M12 chargers are designed to quickly and efficiently charge their REDLITHIUM batteries.

Standard Chargers: Typically charge a 4.0 Ah XC battery in about an hour.
Rapid Chargers: Significantly reduce charging times, often cutting them in half, which is invaluable on a busy job site.
Multi-Bay Chargers: For users with multiple M12 tools, multi-bay chargers allow you to charge several batteries simultaneously or sequentially, ensuring you always have fresh power.

In essence, the M12 Fuel Hackzall benefits tremendously from being part of a well-developed battery ecosystem.

The ability to choose between compact and extended-capacity batteries, coupled with the intelligent power management of REDLINK PLUS, means you get reliable performance and extended runtimes tailored to your specific needs.

This system flexibility is a major factor in the Hackzall’s overall appeal and efficiency.

Blade Selection and Tool-Free Blade Changes: Maximizing Performance

The best reciprocating saw in the world is only as good as the blade attached to it.

For the M12 Fuel Hackzall, understanding blade types and mastering its tool-free blade change mechanism are critical for maximizing its versatility and efficiency.

The right blade for the right material not only ensures a cleaner, faster cut but also significantly extends blade life and tool performance.

The Importance of Blade Selection

Reciprocating saw blades come in a bewildering array of types, sizes, and tooth configurations, each optimized for specific materials and applications.

Using the wrong blade can result in slow cuts, premature blade wear, excessive heat, and even unsafe conditions. Ninja Mega Kitchen System [BL770, BL770AMZ, BL771]

Blade Length: Hackzall blades are generally shorter than full-size Sawzall blades often 4-6 inches for compact applications. Longer blades up to 9 inches can be used, but remember the Hackzall’s shorter stroke length means less of the blade’s length will be actively cutting. Match the blade length to the material thickness you’re cutting, ensuring the blade extends fully beyond the material for efficient chip ejection.
Teeth Per Inch TPI: This is a crucial factor.
- Low TPI e.g., 6 TPI, 10 TPI: Fewer, larger teeth, spaced further apart. Ideal for fast, rough cuts in wood, demolition with nails, and thick plastics. The larger gullets spaces between teeth allow for rapid material removal.
- Medium TPI e.g., 10-14 TPI: A good all-around choice for wood with nails, thicker metals, and general purpose demolition.
- High TPI e.g., 18 TPI, 24 TPI: More, smaller teeth, closely spaced. Essential for clean cuts in thin metals conduit, sheet metal, PVC, and non-ferrous metals. The finer teeth reduce tearing and leave a smoother edge.
Blade Material:
- High Carbon Steel HCS: Inexpensive, but primarily for wood and soft plastics. Dulls quickly on metal.
- Bi-Metal: The most common and versatile. Combines a high-speed steel HSS cutting edge with a flexible carbon steel body. This provides sharpness, durability, and flexibility, making them excellent for wood with nails, metal, and general demolition. Highly recommended for the Hackzall due to its versatility.
- Carbide-Tipped e.g., Milwaukee AX with Carbide, Diablo Demo Demon with Carbide: Premium blades with carbide teeth brazed onto a steel body. Extremely durable and long-lasting, designed for the toughest applications like cast iron, stainless steel, fiberglass, abrasive materials, and nail-embedded wood. They are more expensive but offer unparalleled performance and longevity in demanding tasks.
- Grit/Diamond Edge: For abrasive materials like tile, masonry, fiberglass, and cast iron. These don’t have traditional teeth but rather abrasive particles for grinding through material.

Examples of Blade Recommendations for the Hackzall:

For PVC/Copper/Conduit: A fine-tooth bi-metal blade e.g., 18 or 24 TPI metal-cutting blade will provide clean, efficient cuts.
For Wood Clean: A 6 TPI or 10 TPI bi-metal wood-cutting blade for fast cuts.
For Wood with Nails/Demolition: A bi-metal demolition blade e.g., 6/10 TPI variable pitch or a carbide-tipped blade like the Milwaukee AX. This is where carbide blades truly shine.
For Threaded Rod/Thicker Metal: A 14 TPI or 18 TPI bi-metal metal-cutting blade.

The Efficiency of Tool-Free Blade Changes

One of the most user-friendly features on modern reciprocating saws, and certainly on the M12 Fuel Hackzall, is the tool-free blade change mechanism.

This might seem minor, but it’s a huge time-saver and convenience factor on the job site.

How it Works Typical Mechanism: The Hackzall usually features a lever or collar on the blade clamp that you simply pull, twist, or push to release the blade.
1. To Insert: Hold the lever open, insert the blade shank fully into the clamp until it seats, then release the lever. You should feel it lock securely.
2. To Remove: Pull or twist the lever to release the clamp, and the blade will slide out.
Benefits on the Job Site:
- Speed: No more fumbling for an Allen wrench or screwdriver. You can swap blades in seconds. This is critical when switching between different materials e.g., wood to metal or when a blade breaks unexpectedly.
- Convenience: Especially in tight spaces or while wearing gloves, a tool-free mechanism is much easier to operate.
- Safety: Reduces the risk of dropping small tools or fumbling with hot blades.
- Maximizes Versatility: Because changing blades is so easy, users are more likely to switch to the correct blade for each task, rather than trying to make do with a suboptimal blade, which can lead to inefficient cuts and premature wear.
Important Considerations:
- Blade Orientation: Pay attention to which way the teeth are facing when inserting the blade. For most applications, teeth should point down, away from the tool body.
- Secure Seating: Always ensure the blade is fully seated and locked in the clamp before operating the saw. A loose blade is a safety hazard and will result in poor cuts.
- Hot Blades: After cutting, blades can become very hot. Use gloves or allow them to cool before removal to prevent burns.

By understanding the nuances of blade selection and leveraging the Hackzall’s efficient tool-free blade change system, users can significantly enhance their cutting performance, extend the life of their blades, and make the most of this versatile compact saw.

It’s a small detail that makes a huge difference in daily usability.

Durability and Build Quality: Built for the Jobsite

Milwaukee tools have a reputation for being tough, and the M12 Fuel Hackzall is no exception.

Designed for the rigors of professional job sites, its construction emphasizes durability, impact resistance, and longevity. Ninja Deluxe Kitchen System

This robust build quality ensures that your investment can withstand the bumps, drops, and demands of daily use, making it a reliable partner for years to come.

High-Quality Materials and Construction

Milwaukee doesn’t skimp on the materials used in their FUEL line, and the Hackzall benefits from this commitment to quality.

Reinforced Gearing and Housing: The internal gears, which transmit power from the motor to the blade, are typically made from hardened steel, designed to withstand the high forces of reciprocating motion. The gearbox housing itself is often a robust metal alloy, providing rigidity and protecting these critical components from impact.
Impact-Resistant Composites: The outer casing of the Hackzall is constructed from high-quality, impact-resistant composite plastics. These materials are engineered to absorb shocks from drops and bumps without cracking or deforming. This isn’t just about looking good. it’s about protecting the internal electronics and motor from damage.
Rubber Overmold: As discussed in ergonomics, the rubber overmold isn’t just for grip and comfort. It also acts as an additional layer of shock absorption, protecting the tool’s body from impacts and abrasions. It’s strategically placed on key areas prone to contact.
Sealed Electronics: Given that power tools are often exposed to dust and debris, the internal electronics of the Hackzall are designed to be well-protected. While not necessarily “waterproof,” they are typically sealed against dust and moisture ingress to prevent short circuits and corrosion. This is crucial for maintaining performance in varied job site conditions.

Jobsite Resilience: What It Means in Practice

The “jobsite ready” claim isn’t just marketing speak. it translates into real-world benefits for users.

Drop Protection: Tools get dropped. It’s a fact of life on a busy job site. The Hackzall’s design and materials are intended to withstand typical drops from ladder heights or workbenches without catastrophic failure. While any drop can be damaging, the Hackzall is built to take more abuse than a consumer-grade tool.
Dust and Debris Resistance: Reciprocating saws generate a lot of dust and chips. The Hackzall’s design minimizes ingress of these particles into critical components, helping to prevent premature wear or blockages that could affect performance. The blade clamp mechanism is often designed to clear debris effectively.
Temperature Extremes: Professionals often work in varying temperatures, from cold winters to hot summers. The materials and electronics are designed to operate reliably across a wide temperature range without significant degradation in performance.
Vibration Management: While not purely a durability feature, the advanced anti-vibration mechanisms not only enhance comfort but also reduce the stress placed on the tool’s internal components, contributing to overall longevity. Less internal rattling and component stress mean a longer lifespan.

Longevity and Warranty

Milwaukee stands behind its FUEL products with a robust warranty. Typically, the M12 FUEL Hackzall comes with a 5-year limited warranty on the tool itself, and a 2-3 year warranty on the REDLITHIUM batteries.

Meaning of the Warranty: This isn’t just a piece of paper. it’s an assurance from the manufacturer that they trust the durability and craftsmanship of their product. A 5-year warranty for a power tool is excellent and demonstrates confidence in its ability to withstand professional use.
Service and Support: Should issues arise, Milwaukee has an extensive network of service centers and authorized repair facilities, making it relatively straightforward to get tools serviced under warranty or for repairs out of warranty. Access to genuine parts is also generally good.

In conclusion, the M12 Fuel Hackzall is built with the professional user in mind.

Its combination of high-quality materials, intelligent design, and robust construction means it’s not just a powerful tool, but a durable one, capable of enduring the challenging environment of a job site.

This commitment to durability protects your investment and ensures the tool remains a reliable performer for years to come.

Comparing with Full-Size Reciprocating Saws: Hackzall’s Niche

It’s tempting to compare the M12 Fuel Hackzall directly to a full-size reciprocating saw, like Milwaukee’s own M18 FUEL Sawzall.

However, this is largely an apples-to-oranges comparison.

While both are reciprocating saws, they are designed for fundamentally different applications and excel in their respective niches. Midea MAD35S1QWT

Understanding these distinctions is crucial for selecting the right tool for your specific needs.

Where the Hackzall Shines Compact & Precision:

The Hackzall’s smaller stature is its superpower, making it the undeniable champion in several key areas:

Portability and Maneuverability: This is the Hackzall’s core advantage. Its lightweight and compact design often 3.5 lbs with a compact battery vs. 8-10 lbs for a full-size Sawzall makes it incredibly easy to carry, transport, and manipulate in tight spaces.
- Benefit: Ideal for overhead work, reaching into cramped wall cavities, under sinks, or within crawl spaces. It’s your go-to for situations where a larger saw simply won’t fit or is too cumbersome.
One-Handed Operation: As previously discussed, the Hackzall is engineered for effective one-handed use.
- Benefit: Frees up your other hand for holding material, bracing, or maintaining balance. This is invaluable in awkward positions or when working from a ladder.
Precision and Control: While “precision” for a reciprocating saw is relative, the Hackzall’s shorter stroke length typically 1/2-inch vs. 1-1/8-inch and lighter weight offer more control.
- Benefit: Better for cutting smaller diameter pipes PVC, copper, conduit, threaded rod, and making controlled cuts in existing structures where accuracy is important. Less chance of overcutting or damaging surrounding material.
Reduced Fatigue: Its low weight and ergonomic design mean significantly less user fatigue over extended periods.
- Benefit: You can work longer and more comfortably, especially when repetitive cuts or overhead tasks are involved.
Quick “Grab-and-Go” Tool: For quick, on-the-fly cuts or small jobs, the Hackzall is often the first tool you’ll reach for because of its convenience.
- Benefit: Saves time and effort compared to hauling out a larger, heavier saw for a minor task.

Where Full-Size Reciprocating Saws Dominate Power & Demolition:

A full-size reciprocating saw, often colloquially called a “Sawzall” a Milwaukee trademark, is built for raw power and aggressive material removal.

Raw Power and Aggressiveness: Full-size saws typically feature more powerful motors e.g., 18V or corded, longer stroke lengths 1-1/8 to 1-1/4 inches, and higher SPM ratings up to 3,000 SPM or more, often with orbital action.
- Benefit: Essential for heavy-duty demolition, cutting through thick materials multiple layers of wood, large beams, thick metals, and situations where speed and brute force are paramount.
Heavy-Duty Demolition: When you need to tear down walls, cut through whole sections of framing, or slice through thick metal pipes, a full-size Sawzall is indispensable.
- Benefit: Its long stroke rapidly clears chips, preventing clogging, and its power drives through stubborn materials.
Cutting Capacity: Full-size saws generally have a much larger cutting capacity for single-pass cuts.
- Benefit: Can handle larger diameter pipes, thicker lumber, and more substantial metal profiles without needing multiple passes or techniques.
Vibration Control often more advanced: While still vibrating significantly, higher-end full-size saws often incorporate more sophisticated anti-vibration mechanisms to manage their higher power output.
- Benefit: Can reduce user fatigue slightly during prolonged, aggressive demolition work, though they will always be more fatiguing than a Hackzall due to their weight and power.

The Verdict: Complementary, Not Competitive

The M12 Fuel Hackzall and a full-size reciprocating saw are not direct competitors. they are complementary tools.

For Professionals: Most professionals in trades like plumbing, electrical, HVAC, and remodeling will benefit from owning both. The Hackzall handles the finesse, tight-space, and quick-cut tasks, while the full-size Sawzall handles the heavy demolition and high-volume cutting.
For DIYers: If your projects are generally smaller, involve renovations, or require precise cuts in existing structures, the Hackzall might be your primary reciprocating saw. If you anticipate large-scale demolition or cutting very thick materials, a full-size saw is a necessary investment.

Think of it this way: The Hackzall is your scalpel for precise, quick operations in confined spaces.

The full-size Sawzall is your sledgehammer for powerful, destructive work.

Both are vital tools, but their applications rarely overlap in a way that makes one a direct substitute for the other.

Choosing between them isn’t about which is “better,” but which is “better suited” for the specific tasks you’ll be tackling most frequently.

Maintenance and Care: Extending Your Hackzall’s Lifespan

Just like any high-performance tool, your M12 Fuel Hackzall will serve you best and last longest with proper maintenance and care.

While modern cordless tools are remarkably robust, a little attention goes a long way in ensuring its longevity and consistent performance on the job site. Home Work For Earn Money

It’s not about complex procedures, but rather simple habits.

Regular Cleaning and Inspection

The most fundamental aspect of tool maintenance is routine cleaning and inspection.

Reciprocating saws generate a lot of dust, chips, and debris, especially when cutting through varied materials.

After Each Use or periodically during heavy use:
- Brush Off Debris: Use a dry cloth, a stiff brush, or compressed air if available to remove sawdust, metal shavings, and other debris from the tool’s exterior, especially around the blade clamp, motor vents, and trigger area.
- Inspect Blade Clamp: Pay close attention to the blade clamp mechanism. Ensure it’s free of packed-in debris that could hinder proper blade insertion or removal. A clean clamp ensures blades seat securely.
- Check Motor Vents: Make sure the motor ventilation slots are clear and unobstructed. Blocked vents can lead to overheating, which is detrimental to the motor and electronics.
Monthly/Quarterly or more often with heavy use:
- Thorough Cleaning: A more detailed cleaning of all crevices and moving parts.
- Inspect Cord/Battery Terminals: If you have a corded tool, check the cord for any fraying or damage. For cordless, ensure the battery terminals on both the tool and the battery are clean and free of corrosion. A dirty connection can lead to power loss or charging issues.
- Blade Condition: Regularly inspect your blades. Dull blades are inefficient, dangerous, and put unnecessary strain on the tool’s motor. Replace dull, bent, or broken blades immediately.
- Fastener Tightness: Briefly check that all visible screws and fasteners are tight. Vibrations from use can sometimes loosen them over time.

Proper Storage

How you store your Hackzall significantly impacts its lifespan.

Dry Environment: Always store the tool in a dry place to prevent rust on metal components and corrosion on electronics. Avoid damp garages, basements, or outdoor sheds if not climate-controlled.
Out of Extreme Temperatures: Avoid storing the tool in direct sunlight, or in extremely hot or cold environments for prolonged periods. Extreme temperatures can degrade battery life and affect internal lubricants or plastics.
Secure Storage: Store it in a tool bag, case, or dedicated spot where it won’t be easily knocked around or suffer accidental drops.
Remove Battery: For long-term storage more than a few days/weeks, it’s a good practice to remove the battery from the tool. This prevents phantom drain and potential issues.

Battery Care

The batteries are often the most expensive consumable part of a cordless tool system, so proper care is paramount.

Charge Before Storage for long periods: If storing batteries for an extended time several months, charge them to about 50-70% capacity. Storing them fully charged or completely depleted can reduce their lifespan.
Avoid Overcharging/Over-Discharging: Milwaukee’s REDLINK PLUS intelligence helps with this, but still, avoid leaving batteries on a charger indefinitely after they’re full or letting them drain completely repeatedly.
Keep Them Cool: Store batteries in a cool, dry place. Heat is the enemy of battery life. Don’t leave them in a hot car.
Use Proper Charger: Always use the Milwaukee-branded charger designed for your M12 batteries. Off-brand chargers can damage batteries.

Listen to Your Tool

Your Hackzall will often give you subtle clues if something isn’t right.

Unusual Noises: Any new grinding, squealing, or rattling sounds can indicate an internal issue.
Excessive Heat: While tools get warm, excessive heat from the motor housing during normal use might suggest an issue with internal components or that you’re pushing the tool too hard.
Reduced Performance: If the tool feels weaker than usual, struggles with materials it used to cut easily, or has inconsistent speed, it might be time for inspection or service.

By incorporating these simple maintenance and care routines into your workflow, you’ll not only extend the life of your M12 Fuel Hackzall but also ensure it performs optimally every time you pick it up, saving you time, frustration, and money in the long run.

Value Proposition: Is the M12 Fuel Hackzall Worth It?

When considering any tool purchase, especially one that sits at a premium price point like the Milwaukee M12 Fuel Hackzall, the critical question is always: “Is it worth the investment?” For many professionals and serious DIYers, the answer is a resounding yes, and it boils down to a clear value proposition that combines performance, convenience, and durability.

The Investment: Price Point

The M12 Fuel Hackzall tool-only typically costs around $149 – $179, with kits including battery and charger ranging from $199 – $250+ depending on the battery size. This places it firmly in the premium category for compact reciprocating saws, notably higher than entry-level 12V or even some brushed 18V compact saws from other brands.

The Return on Investment: What You Get for Your Money

The value of the Hackzall isn’t just in its initial cost. Timtam Massage Gun

It’s in the long-term benefits and efficiencies it brings to your work.

Time Savings:
- Faster Cuts: The POWERSTATE brushless motor and optimized stroke/SPM deliver surprisingly fast cuts for its size, especially in common materials like PVC, copper, and EMT. Time saved on each cut adds up significantly over a project or a career.
- Less Setup/Teardown: Its grab-and-go nature and tool-free blade changes mean less time fiddling and more time cutting.
- Accessibility: Its ability to get into tight spaces means you avoid time-consuming manual alternatives hacksaws or having to cut out larger sections of material for access.
Increased Productivity and Efficiency:
- Reduced Fatigue: As discussed, the lightweight and ergonomic design mean you can work longer, more comfortably, and with less strain. This translates directly to more work done per day or fewer breaks needed.
- One-Handed Operation: This isn’t just a convenience. it can literally double your efficiency in situations where one hand is needed for support or positioning.
- Reliability: A durable tool that consistently performs and doesn’t break down means fewer frustrating delays and trips to the repair shop.
Durability and Longevity:
- Jobsite Tough: It’s built to withstand the abuses of a professional environment. Investing in a tool that lasts for years, rather than needing frequent replacements, is a significant cost saving over time.
- Brushless Motor: The POWERSTATE motor’s inherent efficiency and lack of wear-and-tear components mean a longer motor life compared to brushed alternatives.
- REDLINK PLUS Intelligence: This protective system safeguards both the tool and the batteries, extending their lifespan and ensuring consistent performance.
Versatility and Adaptability:
- Multi-Trade Use: The Hackzall is a true cross-trade tool, invaluable for plumbers, electricians, HVAC technicians, remodelers, and even general contractors. Its wide range of applications means you get more utility out of a single tool.
- M12 Ecosystem: If you’re already invested in Milwaukee’s M12 platform, the Hackzall seamlessly integrates, leveraging your existing batteries and chargers, further enhancing its value. If you’re starting fresh, the M12 line offers a vast array of compact, powerful tools.
Safety Indirect Benefit:
- While not directly a “feature” you pay for, a tool that’s easy to control, lightweight, and less fatiguing can contribute to safer work practices, reducing the risk of accidents from fatigue or loss of control.

Who Is It For?

Plumbers, Electricians, HVAC Technicians: Almost a must-have for these trades due to frequent cuts in pipes, conduit, and tight spaces. The ROI here is almost immediate.
Remodelers/General Contractors: Invaluable for rough openings, minor demolition, and working in existing structures where a full-size saw is too much.
Serious DIYers/Homeowners: If you frequently tackle home improvement projects, especially those involving plumbing or electrical work, the Hackzall will save you immense frustration and time. It’s an excellent step up from manual methods for these tasks.
Anyone Prioritizing Portability and One-Handed Use: If your work often involves working overhead, from ladders, or in very confined areas, this tool will dramatically improve your efficiency and comfort.

The Bottom Line

The M12 Fuel Hackzall might carry a higher upfront cost than some alternatives, but its superior performance, ergonomic design, jobsite durability, and the significant time and labor savings it provides make it a highly worthwhile investment.

It’s a tool that pays for itself in efficiency and reduced frustration, becoming an indispensable part of your toolkit rather than just another gadget.

For those who understand the value of speed, precision in tight spaces, and reduced fatigue, the M12 Fuel Hackzall delivers exceptional value.

Frequently Asked Questions

What is the primary difference between a Hackzall and a Sawzall?

The primary difference is size and intended application: a Hackzall like the M12 Fuel Hackzall is a compact, often one-handed reciprocating saw designed for tight spaces and quick cuts in smaller materials, while a Sawzall Milwaukee’s full-size reciprocating saw is a larger, two-handed tool built for heavy-duty demolition and aggressive cutting of larger materials. Massage Gun Features

Is the M12 Fuel Hackzall suitable for cutting wood?

Yes, the M12 Fuel Hackzall is suitable for cutting wood, especially dimensional lumber up to 2x4s or 2x6s, plywood, and trim work.

Its performance is excellent for quick cuts and in tight spaces, but it’s not designed for large-scale framing or cutting large timbers like a full-size Sawzall.

Can the M12 Fuel Hackzall cut metal?

Yes, the M12 Fuel Hackzall can effectively cut various types of metal, including copper pipe, EMT conduit, threaded rod, and even lighter gauge steel, provided you use the appropriate metal-cutting bi-metal or carbide-tipped blades.

What battery is best for the M12 Fuel Hackzall?

For the best balance of power and runtime, the M12 REDLITHIUM XC 4.0 Ah or 6.0 Ah battery is generally recommended for the Hackzall. While compact CP batteries 1.5 Ah, 2.0 Ah make it lighter, the XC packs provide significantly longer working duration.

How long does the M12 Fuel Hackzall battery last?

Battery life varies significantly based on the battery capacity and the material being cut.

With an M12 XC 4.0 Ah battery, you can expect to make dozens, if not hundreds, of cuts in light materials like PVC, or around 15-30 minutes of aggressive cutting in tougher materials like threaded rod.

Does the M12 Fuel Hackzall have a brushless motor?

Yes, the M12 Fuel Hackzall features Milwaukee’s POWERSTATE brushless motor, which provides increased efficiency, longer motor life, and more power and run-time compared to brushed motors.

Is the Hackzall good for plumbing?

Yes, the Hackzall is excellent for plumbing tasks.

Its compact size and ability to cut PVC, ABS, copper, and even small cast iron pipes in tight spaces under sinks, in walls make it an indispensable tool for plumbers.

Can I use a regular Sawzall blade with the Hackzall?

Yes, the M12 Fuel Hackzall uses standard universal tang reciprocating saw blades, meaning you can use any brand of Sawzall blade that fits this common shank style. Best Body Massager Gun

How do you change the blade on the M12 Fuel Hackzall?

The M12 Fuel Hackzall features a tool-free blade change mechanism.

Typically, you pull or twist a lever/collar on the blade clamp, insert or remove the blade, and then release the lever to lock it in place.

Is the M12 Fuel Hackzall good for demolition?

The M12 Fuel Hackzall is good for light demolition, such as cutting out drywall sections, small pieces of wood with nails, or disassembling small structures in confined areas. For heavy-duty demolition of large materials, a full-size Sawzall is more appropriate.

What is the stroke length of the M12 Fuel Hackzall?

The M12 Fuel Hackzall typically has a 1/2-inch stroke length, which is optimized for its compact design and efficient cutting of smaller materials.

What is the maximum SPM Strokes Per Minute of the Hackzall?

The M12 Fuel Hackzall has a variable speed trigger, allowing it to reach up to 3,000 SPM Strokes Per Minute.

Is the M12 Fuel Hackzall worth the price?

Yes, for many professionals and serious DIYers, the M12 Fuel Hackzall is worth the price due to its exceptional portability, one-handed operation, surprising power for its size, durability, and the time and effort it saves in tight and awkward cutting situations.

Does the Hackzall come with a case?

Some M12 Fuel Hackzall kits may come with a carrying case, but the tool-only version typically does not.

Check the specific product listing or kit contents before purchase.

Can the M12 Fuel Hackzall cut roots?

Yes, with an appropriate wood-cutting or pruning reciprocating saw blade, the M12 Fuel Hackzall can effectively cut through small to medium-sized roots in landscaping tasks.

What is REDLINK PLUS intelligence?

REDLINK PLUS intelligence is Milwaukee’s advanced electronic system that provides optimized performance and overload protection for the tool, battery, and charger, ensuring longer tool life and maximum efficiency. Best Barbell Canada

Does the M12 Fuel Hackzall have a light?

Yes, the M12 Fuel Hackzall typically includes an LED light that illuminates the cutting area, which is very helpful in dimly lit spaces.

Can the Hackzall replace a hacksaw?

Yes, the M12 Fuel Hackzall can largely replace a traditional hacksaw for most cutting tasks, especially in metal and plastic, offering significantly faster and less fatiguing cuts.

What kind of warranty does the M12 Fuel Hackzall have?

The Milwaukee M12 Fuel Hackzall typically comes with a 5-year limited warranty on the tool itself, and a 2-3 year warranty on the M12 REDLITHIUM batteries.

Is the M12 Fuel Hackzall loud?

Like most power tools, the M12 Fuel Hackzall produces noise during operation.

While generally less noisy than a full-size reciprocating saw, hearing protection is always recommended.

How does the M12 Fuel Hackzall compare to the Ryobi PCL515B?

The M12 Fuel Hackzall generally offers superior power, durability, and a more compact design due to its FUEL brushless motor and robust build, making it a professional-grade option, while the Ryobi PCL515B is a good value option for lighter, occasional use within the Ryobi ONE+ system.

Can the M12 Fuel Hackzall cut ceramic tile?

With specialized carbide grit or diamond-edge reciprocating saw blades, the M12 Fuel Hackzall can make rough cuts in ceramic tile, but it’s not ideal for precise, clean tile cuts which are better suited for tile saws or angle grinders.

How heavy is the M12 Fuel Hackzall?

The M12 Fuel Hackzall typically weighs around 3.5 to 4.0 pounds with a compact battery, making it very lightweight and easy for one-handed operation.

Is the M12 Fuel Hackzall good for electricians?

Yes, the M12 Fuel Hackzall is an excellent tool for electricians, perfect for cutting conduit EMT, PVC, threaded rod, and cable in tight electrical boxes or crowded ceiling spaces.

Can the M12 Fuel Hackzall cut through nails in wood?

Yes, with the appropriate bi-metal or carbide-tipped demolition blade often labeled “for nail-embedded wood”, the M12 Fuel Hackzall can cut through nails embedded in wood. Kraftgun Massager

Does the M12 Fuel Hackzall have orbital action?

No, the M12 Fuel Hackzall typically does not have orbital action. Orbital action is generally found on larger reciprocating saws to increase cutting speed in wood, but it’s less critical for the Hackzall’s intended compact applications.

What types of blades are available for the Hackzall?

A wide variety of blades are available for the Hackzall, including bi-metal blades for wood with nails and general purpose, metal-cutting blades various TPIs, carbide-tipped blades for tough materials like cast iron or stainless steel, and specialized blades for plastics, pruning, or abrasive materials.

Can I use an M18 battery with the M12 Fuel Hackzall?

No, the M12 Fuel Hackzall is part of the 12V M12 platform and is only compatible with Milwaukee M12 REDLITHIUM batteries.

M18 batteries are 18V and have a different connection design.

Is the M12 Fuel Hackzall loud enough to require hearing protection?

Yes, it is strongly recommended to wear hearing protection when operating the M12 Fuel Hackzall or any power tool, as noise levels can reach harmful decibels, especially during prolonged use.

What is the best way to clean my M12 Fuel Hackzall?

The best way to clean your M12 Fuel Hackzall is to brush off loose debris with a dry cloth or stiff brush after each use, especially around the blade clamp and motor vents.

Compressed air can be used for more thorough cleaning of hard-to-reach areas.

Ensure motor vents are clear to prevent overheating.

M12 Fuel Hackzall Review