Features and Benefits: The extra thin wall design allows easy access to recessed wheel nuts where space is limited; Due to the extra thin wall design, they should only be used on wheel nuts where limited torque is applied; For use only with 1/2″ drive tools; DO NOT use reducing adapters; Made from high quality chrome-molybdenum steel; Impact Socket, 1/2 in.; Drive, 21mm Deep, 6-Point, Extra Thin Wall