The Milwaukee 2562-21 M12 FUEL Stubby 3/8 in. Impact Wrench 5.0Ah Kit is a compact cordless impact wrench built for high-torque fastening and bolt removal in tight spaces. This is a cordless impact wrench designed for removing stubborn fasteners and handling compact mechanical fastening work. Model number 2562-21 includes the M12 FUEL stubby 3/8 inch impact wrench, an M12 REDLITHIUM HIGH OUTPUT XC5.0 battery, an M12 charger, and a contractor bag.

What makes this tool matter is the mix of size and real output. Milwaukee rates it at up to 550 ft-lbs of nut-busting torque with a 0 to 3,000 RPM range and 0 to 3,300 IPM. In plain terms, that means this 3/8 inch impact wrench is aimed at mechanics, service techs, and serious DIY users who need enough power to break loose rusted or seized hardware, but do not want to drag a larger impact into every job. Milwaukee also calls out 50% faster application speeds, which matters when you are running through repeated fastener removal instead of fighting one bolt at a time.

The compact body is the other big selling point. At only 4.8 inches long and 2.2 pounds bare tool, this stubby impact wrench is built for access. That is the reason people buy a tool like this instead of a mid-torque or high-torque model. It gets into cramped engine bays, suspension work areas, maintenance access panels, and equipment service points where extra length becomes the problem before raw power does. Less weight also means less fatigue if this tool lives in your hand all day.

Milwaukee uses a POWERSTATE brushless motor here, and that matters for more than just a spec sheet. A brushless motor helps the tool stay efficient under load and supports the faster application speed Milwaukee claims. Combined with the 4-Mode DRIVE CONTROL, you get a more usable power range instead of a one-speed hammer. Mode selection lets you back off when working on smaller hardware and step up when you need the full output. Milwaukee also includes auto shut-off mode, which limits forward torque to no more than 15 ft-lbs for hand-tight applications, plus bolt-removal mode, which slows the tool once the fastener breaks free.

On real jobs, those control features are what separate a good compact impact wrench from one that is just powerful on paper. Auto shut-off helps when you are starting lug bolts, snugging smaller fasteners, or working where over-tightening creates extra rework. Bolt-removal mode is just as practical. When a bolt comes loose, the tool drops speed so hardware is less likely to shoot out and disappear under a bench, into a splash shield, or across the shop floor. Milwaukee also says mode changes can be done one-handed by placing the forward-reverse shuttle in neutral and double tapping the trigger, which is the kind of small productivity feature that actually matters when you are moving fast.

Jobsite visibility and day-to-day handling are covered well too. The Tri-LED work lights are there to reduce shadows around the socket area, which is exactly where many compact impacts fall short. The tool also uses a 3/8 inch square friction ring anvil, a solid choice for quick socket swaps during repetitive fastening work. Milwaukee adds a battery isolation system for a more secure battery connection and reduced vibration transferred to the pack, along with a premium rubber overmold for grip and durability.

As a kit, the platform matters just as much as the bare tool. This model runs on the Milwaukee M12 battery system and is compatible with all M12 batteries and chargers. The included M12 REDLITHIUM HIGH OUTPUT XC5.0 battery is meant to support the performance of the tool while running cooler and offering resistance to common shop chemicals like oils, greases, and solvents. If you are already on M12, this kit drops right into your existing lineup. If you are not, it is still a strong way to get into the platform with a tool that solves a very common access problem.

Who should buy it? This Milwaukee impact wrench kit makes the most sense for automotive work, maintenance, service, fleet work, equipment repair, and general fastening jobs in tight quarters. If your work involves compact spaces and stubborn fasteners, this is the kind of tool that earns its keep quickly. If you regularly need maximum sustained torque on large structural hardware, you will still want a bigger impact for those jobs. But for the work most users hit most often, this stubby gets the balance right.

Milwaukee 2562-21 M12 FUEL Stubby 3/8 in. Impact Wrench Kit Gets the Job Done Without the Bulk

This is the kind of compact impact wrench that makes you reach for the bigger gun less often than you expected.

• Who it's for: Techs, mechanics, maintenance crews, and serious DIY users who need real torque in places where a larger impact wrench is more hassle than help.
• Why it stands out: The short 4.8 in body, 550 ft-lbs nut-busting torque, and useful control modes make it more than just a small impact. It is a legit daily-use fastening tool.
• Worth knowing: This is still a 3/8 in M12 tool, so if your day is all heavy truck lugs and oversized structural hardware, you will still want a larger impact in the lineup.

• Is this a cordless impact wrench or an impact driver? This is a cordless 3/8 in impact wrench with a square friction ring anvil for sockets.
• What battery platform does it use? It runs on Milwaukee M12 batteries and is compatible with all M12 batteries and chargers.
• Does it have variable power control? Yes. It has 4-Mode DRIVE CONTROL plus auto shut-off and bolt-removal mode for better control over speed and output.
• How compact is it? The tool measures 4.8 in in length and weighs 2.2 lb without the battery.