Teng TENM380517 Hexagon Socket 3/8in Drive 17mm This Teng Tools Socket is a professional 3/8in Drive regular 6-point metric socket produced in accordance with ISO 9000 and AS954 specifications. It provides excellent torque and reduces the risk of rounding fasteners. This socket has a stepped collar on the shank and is of the hexagonal variety. The socket is manufactured from chrome vanadium steel with a satin finish. Size: 17mm. Overall length 29mm