Screw driver bits set 10pc. The tip of a screwdriver is thermally treated to increase the time of use. Built with special steel and is very stable and provides a rapid and efficient screw.The screws used for mounting on surfaces with different materials. Kit Contents: Quick change magnetic holder, PH 1 mm, 2 mm, 3 mm, PZ 1 mm, 2 mm, 3 mm, SL 4 mm, 5 mm, 5.5 mm, 8 mm.