DAOKI 8pcs 75mm Magnetic Long Hex Cross Head Screw Driver Bits Electric Screwdriver Materials: S2 alloy steel Type of head: cross / phillips Type of shank: 6.35mm / 1/4 inch hex? Net weight: (approx.) 100g Those bits fit for electric screwdrivers, hand screwdrivers, electric drills, air drills and so forth.