"Six-point wheel bearing locknuts are easy to remove or install with these specially designed sockets. Openings resist 'rounding out.' Can be used with an extension and torque wrench to tighten the locknut as required, even when wide-rim wheels are involved. Storage Case Included Yes, Drive in. 1/2, Pieces qty. 7, Works With Wheel bearing locknuts and a torque wrench, Common Usage Remove/install locknut, Includes Locknut sockets and case, Single, Pair, or Set Set. Set includes size 2 3/8in., 2 1/2in. and 55mm locknuts 1 1/2in., 2 3/4in., 2 9/16in. and 2 3/8in. rounded locknuts"