Expert Quality, bits manufactured from hardened and tempered S2 steel with a shot blasted finish. 1/2" Sq. Dr. bit holder from chrome vanadium steel hardened and tempered with a micro satin finish. Features and Benefits • Expert Quality • Contents: bit holder 1/2" sq. dr; 2 spline bits 30mm long and 2 spline bits 75mm long Contents 1 x bit holder 10mm x 1/2" sq. drive 2 x bits: 6 and 8mm x 30mm long 2 x bits: 10 and 12mm x 75mm long