This Teng Tools socket is a professional hexagonal 1/2 inch square drive socket, produced in accordance with ISO9000 and AS954 specifications for increased torque and to reduce the risk of rounding fasteners.The socket is manufactured from strong chrome vanadium steel with a satin finish. The TENM 1/2 inch square drive socket has the following specifications:Size: 15mm.Length: 38mm. Teng Tools started about twenty five years ago with the belief that beauty lives in the details. Over the years, these useful details have come to be known as Typically Teng. Today they offer over 2,200 tools that possess such beauty and they distribute them in more than thirty countries.