1/2″ drive long reach TX55 bit socket;125mm overall length for use on cylinder head bolts;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 or power bar;Designed for use with fastenings with a TX hole;Supplied with a metal socket clip for use with a socket rail