Milwaukee® 120 V Armature Assembly is designed for 1/2" magnum hole shooter with spindle lock, electric drill, hammer drill, 1/2"/1/4" & 3/8" magnum hole shooter, magnum two speed hammer drill, screwgun, electric drill/driver, 1/2" & 3/8" keyless chuck magnum drill, magnum screw-shooter, 1/2" magnum hole shooter, 1/2" reversible magnum hammer drill and magnum keyless chuck hammer drill.