Teng Tools SAE 1/2 Inch Drive Hex Chrome Vanadium Sockets - 3/16
[ FOR HEX FASTENINGS ] Designed for use with hexagon hole fastenings.[ SECURE DRIVE ] Ball bearing recess on the female end to grip a ratchet or extension bar securely. [ EXTRA STRONG ] The socket is made from chrome vanadium steel with an S2 steel bit for strength and flexibility.