Phosphate finish for added corrosion resistance. Suitable for use with any impact tool. Contents: Bits; TRX-Star - T70, T80, T90, T100, Hex - 14, 17, 19, 21, 22mm, Adaptor; 1/2"(M) x 3/4"(F)Sq Drive, 3/4"Sq Drive 165mm Extension Bar, 3/4"Sq Drive Bit Holder.