Kangnice New 8Pcs Magnetic Head Bits S2 Chrome Plated Steel 50mm Torx Screwdriver Bit Set It made of high-strength S2 Chrome Plated Alloy Steel, very durable. Toughness is good, hard to rupture and wearproof.Magnetic bits, in the installation can easily absorb screws. Suitable for installation in pneumatic screwdrivers, electric screwdriver, rechargeable drill, using the wind batch. Widely used power tools, electric screwdriver assembly, electronics industry, household appliances, precision instruments industry, furniture industry screw equipment. Hex Shank Size: 6.35 mm,Total Length: 50mm