Expert Quality, metric bits manufactured from hardened and tempered S2 steel with a shot blasted finish. 1/2" square drive holder made from chrome vanadium steel hardened, tempered and chrome plated for corrosion resistance. Features and Benefits • Expert Quality • Contents: 6 hexagonal bits: 6, 7, 8, 9, 10 and 12mm x 75mm long and bit holder 1/2" sq drive Contents 1 x Bit holder 10mm x 1/2" sq. drive 6 x 75mm hexagonal bits: 6, 7, 8, 9, 10, 12mm