Teng Tools 3/8" Hex Bit Socket3 8" Hex Bit Socket Metric 3mm Chrome vanadium construction with S2 steel bits pressed into the socket Satin finish for improved handling grip Retention groove for secure ball detent connection to the drive end Designed for hexagon hole fastenings, in hex screws or grub screws Manufactured to DIN7422 standards Supplied with a metal socket clip for use with a socket rail