Milwaukee 2821-21 M18 FUEL SAWZALL Recip Saw, 5.0Ah Kit

The Milwaukee 2821-21 M18 FUEL SAWZALL Recip Saw, 5.0Ah Kit is a full-size cordless reciprocating saw kit for plumbers, electricians, HVAC techs, remodelers, and demolition crews. This is a reciprocating saw designed for demolition, pipe cutting, metal cutting, and rough cutting through framing lumber and nail-embedded wood. Model Number 2821-21 includes the M18 FUEL SAWZALL with one M18 REDLITHIUM XC5.0 battery, a charger, and a carrying case, making it a complete starting point for anyone buying into the Milwaukee M18 platform or adding a dedicated demo saw to the truck.

Cutting speed comes down to stroke length and stroke rate. The SAWZALL pairs a 1-1/4" stroke with a variable-speed trigger that runs from 0 to 3,000 strokes per minute. The long stroke moves more blade through the cut and clears chips instead of packing the kerf, and the variable trigger gives you a slow, controlled start when you are plunging into drywall or starting on round pipe. Milwaukee rates it as the fastest-cutting saw in its class.

Reciprocating saws live under heavy load, and the motor and electronics here are built for that. The POWERSTATE brushless motor holds speed when the blade binds in dense material, and REDLINK PLUS intelligence manages the tool and battery together to protect against overloading, overheating, and over-discharging. That protection is a big part of why a saw like this survives years of tear-out work instead of a few seasons.

Milwaukee calls this its most durable cordless SAWZALL, and the durability work is focused on the parts that fail first. The blade clamp is wear resistant and anti-corrosion, and the battery rails are metal reinforced to hold up to the constant vibration of demolition. At 6.8 lbs bare and 17.1" long, the saw is also lighter than the previous generation, which you notice on overhead cuts and when working between joists.

The included M18 REDLITHIUM XC5.0 pack gives the saw enough runtime for real demo days, not just a few cuts. The M18 and M12 multi-voltage charger handles both battery platforms, so it keeps working for you even if you add M12 tools later. The saw is compatible with every M18 battery and charger, so it drops straight into any existing setup.

Day-to-day details make the saw easier to live with. The adjustable shoe lets you move the contact point so the cut uses fresh teeth, which extends blade life. A built-in LED lights the cut in basements, crawl spaces, and mechanical rooms. The hang hook gives you a place to park the saw on a ladder, joist, or pipe rack instead of setting it in debris.

Who should buy it? Plumbers, electricians, HVAC installers, remodelers, general contractors, and serious DIYers who want a full-size brushless demo saw with a battery and charger in the box. If you already own a stack of M18 batteries, the bare tool is the better buy. If you are starting fresh or need a second battery anyway, this kit is the cleaner way in.

Voltage (V) 18V (M18) Motor Type POWERSTATE brushless Strokes per Minute (SPM) 0 to 3,000 SPM Stroke Length 1-1/4" Tool Length 17.1" Weight (lbs) 6.8 lbs (tool only) Battery Included (1) M18 REDLITHIUM XC5.0 Blade Clamp Lever-action QUIK-LOK, tool-free Trigger Variable speed Work Light Built-in LED

The Milwaukee 2821-21 M18 FUEL SAWZALL Recip Saw, 5.0Ah Kit Is the Demo Saw Kit to Start With

A full-size brushless SAWZALL, a real 5.0Ah battery, and a charger that also handles M12, all in one case.

• Who it's for: Plumbers, electricians, remodelers, and demo crews who need a dedicated reciprocating saw and a battery to run it.
• Why it stands out: Long 1-1/4" stroke, 3,000 SPM, and durability upgrades in the clamp and battery rails where older saws wear out first.
• Worth knowing: This is a full-size saw, not a one-handed compact. If you already have M18 batteries, the bare 2821-20 saves you money. Blades are not included, so plan on picking up a set.

• How many batteries come with the 2821-21? One M18 REDLITHIUM XC5.0 battery.
• Is it brushless? Yes. It uses Milwaukee's POWERSTATE brushless motor.
• What is the stroke length and speed? 1-1/4" stroke at 0 to 3,000 strokes per minute.
• Will the charger work with M12 batteries? Yes. The included multi-voltage charger charges both M18 and M12 batteries.