Chrome vanadium. S2 steel bits pressed in to the socket. Satin finish for a better grip when handling the socket. Retention groove for ball detent that secures the connection of the socket to the drive end. Designed for use with fastenings with a TX hole with a security pin. Supplied with a metal socket clip for use with a socket rail [ EXTRA STRONG ] The socket is made from chrome vanadium steel with an S2 steel bit for strength and flexibility. [ TAMPER PROOF ] Designed for use with Torx (TX) hole fastenings with a security pin. [ INSTANT IDENTIFICATION ] The socket features roll stamped markings to ensure permanent and instant socket identification. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.