The Ken-Tool Line of Truck Axle Nut Sockets, made for the most common truck axle retainer nuts in today’s market, are made in the U.S.A. and cold pressed from high-quality, tool-grade steel. Each socket is black e-coated to protect it from corrosion. Each socket’s size is stamped on the socket’s driver receiver end and the Ken-Tool logo and model number are electro-etched on the surface. These sockets are designed for use with breaker bars or ratchet handles, but not for power impact drivers. Each socket features a limited lifetime warranty.