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The Milwaukee M18 FUEL 3/8 in. Compact Impact Wrench is a cordless tool built around a POWERSTATE brushless motor that produces up to 210 ft-lbs of fastening torque and 0-2,500 RPM, with constant output under heavy load. Its standout feature is ONE-KEY: the tool pairs with a phone app to set torque and speed profiles for specific fasteners, stores up to four profiles on the tool, and keeps them in the cloud. REDLINK Plus electronics guard against overload and overheating, and REDLITHIUM packs are claimed to outlast competitive batteries per charge. It suits mechanics and trades who want a compact 3/8 in. driver with app-tuned control, but it is a bare tool in many listings and costs more than simpler brushed compact wrenches.
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Owners of the M18 FUEL compact impact wrench generally rate its power and build highly for a 3/8 in. tool, and ONE-KEY profiles draw praise from users who set them up. Complaints center on the bare-tool packaging and on the app being more than some users need.
This cordless 3/8 in. compact impact wrench is part of the M18 FUEL line. A POWERSTATE brushless motor delivers 0-2,500 RPM and 0-210 ft-lbs of fastening torque, with constant power output under heavy load.
REDLINK Plus intelligence is an electronic system that protects the tool and battery from damage caused by overloading or overheating. REDLITHIUM batteries are designed to deliver more work per charge and more work over the life of the pack.
The wrench is ONE-KEY enabled and connects wirelessly to a smartphone. In the ONE-KEY mobile app, you can choose preset setups for specific fasteners and materials, or set output speed and power yourself. The tool's memory holds up to 4 custom profiles, which you switch between with a button on the tool. Once a profile is saved to the tool, the phone connection is no longer needed. Profiles are also saved in the cloud.
