Set Screw Jewelers' Screwdriver Set, 9 Piece Set | SCR-929.00 Ideal for smaller jobs and hard to reach places in electronics, computer, optical and camera repair Chrome plated steel Set of 9 screwdrivers Color coded heads Straight blades: 1.0, 1.2, 1.4, 1.6 and 2.0 mm. Phillips blades: 1.6, 2.0, 2.5, and 3.0 mm