The Milwaukee M18 FUEL 1/2" Compact Impact Wrench w/ Friction Ring, model 2855-20, is a cordless 1/2 inch impact wrench built for removing and installing fasteners where space is limited. This is an impact wrench designed for automotive service, mechanical fastening, and general bolt work in tight spaces. If you already run Milwaukee's M18 platform and need a bare tool that stays short without giving up real working torque, this is the one aimed at that job.

The big story here is size versus output. Milwaukee rates it at up to 250 ft-lbs of nut-busting torque, with a no-load speed range of 0 to 2,400 RPM and an impact rate up to 3,500 IPM. That matters because a compact impact wrench only earns its spot if it can still break loose hardware that normally pushes you toward a larger tool. At just 4.9 inches in length, this one is built to get between suspension components, behind assemblies, and into spots where a full-size impact wrench can be awkward or simply too long.

Milwaukee uses a POWERSTATE brushless motor in this tool, paired with REDLINK PLUS intelligence. In practical terms, that means the tool is built to manage output while also helping protect against overloads, overheating, and over-discharge. The result is a more controlled cordless fastening tool that is meant to keep performing under repeated use rather than feeling strong for a few bolts and then falling off.

Control is another real reason this model stands out. The 4-Mode DRIVE CONTROL system gives you multiple speed and power settings, including Mode 4 features that are useful on real work. Auto shut-off limits fastening torque to no more than 20 ft-lbs for hand-tight applications, which helps prevent overtightening when you are starting hardware or seating fasteners before final torque. Bolt-removal mode gives full output to break the fastener loose, then slows RPM once it is freed so the bolt does not go flying.

Jobsite and shop visibility also get attention here. Milwaukee places tri-LED lighting around the anvil, which throws light at the fastener area with fewer shadows than a single light positioned lower on the tool. On underbody work, wheel wells, equipment service, and dim mechanical spaces, that is more useful than it sounds on paper because you spend less time repositioning the tool just to see the socket and fastener head.

The Milwaukee M18 FUEL 1/2" Compact Impact Wrench w/ Friction Ring uses a 1/2 inch friction ring anvil for quick socket changes and is compatible with all Milwaukee M18 batteries and chargers. This bare tool format makes the most sense for users already on the M18 battery system who want to add a compact fastening option without paying again for batteries and a charger.

Who is it for? Automotive techs, fleet maintenance crews, industrial maintenance users, and serious DIYers who want a compact cordless impact wrench that still has enough output for real mechanical work. It is especially well suited for users who regularly work in confined spaces and want more control than a bigger, heavier impact wrench usually gives.

Milwaukee M18 FUEL 1/2" Compact Impact Wrench w/ Friction Ring is the right call when access matters as much as torque

This is the kind of impact wrench that earns a permanent spot in the truck or service cart because it gets into places bigger tools cannot without feeling underpowered.

• Who it's for: Techs, mechanics, and M18 users who need a compact cordless impact wrench for real bolt work in crowded spaces.
• Why it stands out: The 4.9 inch length, 250 ft-lbs of breakaway power, tri-LED lighting, and genuinely useful Mode 4 controls make it more than just a small backup tool.
• Worth knowing: This is a bare tool, so plan on supplying your own M18 battery and charger.

• What battery platform does this tool use? It is part of the Milwaukee M18 system and is compatible with all M18 batteries and chargers.
• What size anvil does it have? It uses a 1/2 inch friction ring anvil.
• How much torque does it produce? Milwaukee rates it at up to 250 ft-lbs of nut-busting torque.
• Does it have different speed modes? Yes. It has 4-Mode DRIVE CONTROL, with speed ranges up to 2,400 RPM and special auto shut-off and bolt-removal functions in Mode 4.