10 Pcs Hex Drill Screwdriver Bit, 1/4" Quick Release Shank Magnetic Hexagon Screwdriving bits set

The 10 types of screwdriver Hex Allen 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: 50 mm(2 inch) Materials: S2 Tool Steel Type of Head:hex Shank: 6.35 mm(1/4 inch) Sizes: 1.5mm(H1.5) 2mm (H2) 2.5mm (H2.5) 3mm (H3) 4mm (H4) 5mm (H5) 6mm (H6) 8mm (H8) 10mm (H10) 12mm (H12) Package Include: 1 * 10 Pcs Screwdriver Bits Set 1 * Bits Holder