Milwaukee® Ball Bearing is designed for reversing drain cleaners, magnum two speed hammer drills, drywall screwdrivers, screw guns, drills, drain cleaners, screwdrivers, cordless hammer drills, cordless drills/drivers, power PAC, 1/4" power unit, electric drills/drivers, 1/2" electric drills, 1/2" reversing drills, 12 V 1/2" cordless drill, 3 1/4" & /8" piston drills and 0 - 2500 RPM reversing drywall screwdriver.