Descriptions: Brand new and high quality security star screwdriver bits with 12pcs a set for multiple purposes and requirements.With 1/4inch hex shank, they are widely used on electric screwdrivers, hand screwdrivers, electric drills, pneumatic drill, etc. Features: This product set includes 12pcs security star screwdriver bits in different sizes, so it is convenient to meet your varied requirements. Made from premium chrome vanadium steel, these bits are of high hardness, anti-impact, and wear resistant. With 1/4inch hex shank, they are widely used on electric screwdrivers, hand screwdrivers, electric drills, pneumatic drill, etc. These screwdriver bits are with magnetic tip, so they can be used on hardware conveniently. Suitable for professional maintenance personnel, computer maintenance, camera maintenance, eyeglasses maintenance, instrument maintenance.Specifications: Condition: 100% Brand New Material: Chrome Vanadium Steel Bit Type: Security Star Bit Size:T5, T6, T7, T 8, T9, T10,T15, T20, T25, T27, T30, T40 Hex Shank Size: 6.35mm/(1/4inch)Total Length: 50mm/1.97in Quantity: 12Pcs Weight: 109gPackage Included: 12 * Screwdriver Bits