Screw driver bits set 12pc. The tip of a screwdriver is thermally treated to increase the time of use. Built with special steel and cobalt coating is very stable and provides a rapid and efficient screw.The screws used for mounting on surfaces with different materials. The set consist in Slot, Phillips, Pozidriv, TORX (PH1-2-3, PZ1-2-3, T15-20-25, S0,6x4,5 , S0,8x5,5).