Rxmotor M12 x 1.25mm Thread Pitch Wheel Rim Tuner 1.9" Long Lug Nuts Blue / Chrome 20 Piece Acorn Aluminum Racing Wheel Lug Nuts! Made from high quality CNC machined aluminum These are aluminum material, we highly recommend that you to NOT use impact gun to mount the lugs. Hand tools only for mounting/ removing These lugs nuts are tuner lugs which are made for aftermarket wheels (NOT SAFE TO USE ON OEM WHEELS) Please use a torque wrench to torque each lug nut to proper specs before starting to drive M12 x 1.25MM thread pitch size - 1.9" in length