Teng Tools 1/2 Inch Drive Metric Hex 3.9 Inch Extra Long Chrome Vanadium Sockets

[ EXTRA STRONG ] The socket is made from chrome vanadium steel with an S2 steel bit for strength and flexibility.[ INCREASED GRIP ] Satin finish for a better grip when handling the socket - perfect for oily environments.[ FOR HEX FASTENINGS ] Designed for use with hexagon hole fastenings. Use with in-hex screws or grub screws.[ INSTANT IDENTIFICATION ] The socket features roll stamped markings to ensure permanent and instant socket identification.[ SECURE DRIVE ] Ball bearing recess on the female end to grip a ratchet or extension bar securely.