9 Pcs Phillips Drill Screwdriver Bit, 1/4" Quick Release Hex Shank Magnetic Cross Screwdriving bits set

The 9 types of screwdriver Phillips Tip Bits fairly complete, and Magnetic Bits can be firmly fixed on screwdrivers, and keep screws stuck to them, pretty easy to use. Made of Special S2 Tool Steel, Really Reasonable and Durable, The following shows the material chemical composition. Iron, Fe: 97.0% Silicon: 1.05% Carbon, C: 0.4-0.55% Molybdenum, Mo: 0.4% Manganese, Mn: 0.4% Vanadium, V: ?0.5% Phosphorus, P: ?0.03% Sulfur, S: ?0.03% Specification: Length: 75 mm(3 inch) Materials: S2 Tool Steel Type of Head:hex Shank: 6.35 mm(1/4 inch) Sizes: 75mm*?3.0*PH1 75mm*?4.0*PH1 75mm*?4.5*PH1 75mm*?5.0*PH1 75mm*?6.0*PH1 75mm*?4.0*PH2 75mm*?4.5*PH2 75mm*?5.0*PH2 75mm*?6.0*PH2 Package Include: 1 * 9 Pcs Screwdriver Bits Set 1 * Bits Holder