The M18™ Cordless 1/2" Compact Impact Wrench is the most powerful 1/2" compact impact wrench in its class and offers the best power to size ratio among like competitors. Featuring a Milwaukee® built 4-Pole frameless motor and optimized impact mechanism, this impact driver delivers up to 2,450 RPM, 3,350 IPM and 183 ft-lbs of fastening torque for class-leading performance.