Description: These screwdriver bits are made of High qu ality S 2 material which is durable, anti-impact and TOU GH. Magnetism enables them to fix on screwdrivers firmly. With forCROSS head, they are widely used in electric screwdrivers, hand screwdrivers, electric drills, air drills and so forth. What are you waiting for? Get this set and make your life easier. Features: 1. Made of High qu ality S 2 steel material which is durable, anti-impact and TOU GH, a commonly used material in hardware. 2. Mag netic and thus can be firmly fixed on screwdrivers. 3. 12 different sizes to meet your varied requirements. 4. Fit for electric screwdrivers, hand screwdrivers, electric drills, air drills and so forth. 5. Great accessory for you. Specification: Material: S 2 Steel Color: As shown in the pictures Type of head: Star Type of shank: 6.25mm / 0.25 inch Size: T5, T6, T7, T8, T9, T10, T15, T20, T25, T27, T30, T40 Overall length.: 50mm / 2 inch Quantity: 12 Pieces Package Includes: 12 x Screwdriver Bits Notes: Do not turn the screws with unmatched size, in case get both screw and bit damaged.