All in one screwdriver Material: S2 steel Can work on Screw of PH#0, 1, 2, ... , 2, 3, 4... Type: Precision Scr Key Specifications/Special Features:S2 through hardened, chrome-plated tipHand with triangular structure and torsion ... easy workingResistant to mechanical wearThermal shock stress and acidic corrosion S2 Precision Screwdriver with Chrome-plated Tip