1/2" Sq Drive Chrome Molybdenum steel bit holder with Chrome Vanadium steel S2 bits. Phosphate finish for corrosion resistance. Suitable for use with any impact tool. Contents: 1/2" Sq Drive Bit Holder, Bits; M6, M8, M9, M10, M12, M14, M16, M18. Supplied in storage tray. Model No. AK5611