10pcs 1/4 Inch Hex Shank 100mm Long Magnetic BST Screwdriver Bits Set (Slotted+Cross Hex head) Features: These screwdriver bits are magnetic head, so they can fixed on the screw firmly. Adopted of S2 alloy steel, which is anti-impact and tough, great wear resistant. With 1/4" hex shaft, they are widely used on electric screwdrivers, hand screwdrivers, electric drills, etc. There are  different type screwdriver bit heads ,such as: Slotted head, cross head, hex head .so is convenient to you,  can meet your varied requirements. Fit for electric screwdrivers, hand screwdrivers, electric drills, air drills and so forth. Specifications: Material: S2 alloy steel (Surface sandblasting) Handle size: 6.35 mm/1/4" The total length: 100mm/3.94inch Head type: Slotted head, cross head, hex head specification: Slotted: diam 6mm, diam 5mm, diam 4mm Cross(PH2): PH2 diam6mm, PH2 diam5mm, PH2 diam4.5mm Hex head:H3, H4, H5, H6 Quantity: 10 PCS Package Included: 10 x Screwdriver Bits