6Pcs Hex Screwdriver H2.5 H3 H4 H5 H6 H8 Drill Bits for Magnetic Head Screwdriver 1/4 Inch Cubic Thread Screwdriver SetDescriptions:6pcs 100mm Length Hex Holder Magnetic Hex Screwdriver SetThese hex screwdrivers are made of S2 alloy steel, which is commonly used in high-hardness hardware. The magnetic bits can be securely attached to screwdrivers. Specifications: Materials: S2 alloy steelHead type: hexagonStemtype type: HexDia. Shank: 6.35mm/1/4 inch Screwdriver Length: 100mm Bit Size: H2.5, H3, H4, H5, H6, H8Quantity: 6 PiecesApplication: For 1/4" Air ScrewdriversThese bits fit for electric screwdrivers, handheld screwdrivers, electric drills, air drills and so on. 1x100mm*2.5mm Hex Screwdriver1x100mm*3mmHex Screwdriver 1x100mm*4mmHex Screwdriver 1x100mm*5mmHex Screwdriver 1x100mm*6mmHex Screwdriver 1x100mm*8mm