Screw driver bits set 16pc. 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 Component holding tub and driver bits HEX 3mm, 4mm, 5mm, T20, T25, T30,(SL) 0.6x4.5, 1.0x5.5, 8mm, Phillips (PH) 1mm, 2mm, 3, (PZ) 1, 2 mm, 3mm.