WIHA 71766 Ball End Hex Inch Bit Socket for 1/4" Square Drive with 1/4" Replaceable Hex Bit, 3/16" x 38mm OAL Wiha Easy Change Replaceable Bit Sockets For 1/4-Inch Square Drive Ratchets Chrome Plated polished Sockets Set screw holds bit securely Through hardened for best wear resistance