Features:These screwdriver bits are magnetic head, so they can fixed on the screw firmly.Adopted of high quality 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/3.94inchHead type: Slotted head, cross head, hex headspecification:Slotted: diam 6mm, diam5mm, diam 4mmCross(PH2): PH2 diam6mm, PH2 diam5mm, PH2 diam4.5mmHexhead:H3, H4, H5, H6Quantity: 10 PCS Package Included:10 x Screwdriver Bits.