Milwaukee® 8 mm X 22 mm X 7 mm Ball Bearing is designed for reversing drills, reversing compact drills, 1/2" reversing compact drills, 240 V 1/2" reversing compact drills, 1/2" variable speed reversing compact drills, 1/2" & 3/4" electric drills, rotary hammers, drills, drill presses, lock hammers, electric drills/drivers, international compact drills, screwdrivers, shear, 1/2" D-handle drills 0 - 600 RPM with quik-lok cords, drill presses, 3/4" 350 RPM motors for electromagnetic drill presses, 2.25 max HP 5000 RPM 7"/9" sanders and lock hammers.