Discover the ultimateScrewdriver Bits Set, featuring a comprehensive range of sizes including T6, T7, T8, T9, T10, T15, T20, T25, T27, T30, and T40. Each bit is meticulously crafted from S2 high-quality shock-resisting tool steel, ensuring durability and resistance to abrasion. The sizes are clearly engraved on each shank for quick identification, making your work efficient and hassle-free. Hex Shank: 1/4inch inch, compatible with electric screwdrivers, manual screwdrivers, electric drills, and other standard bit holders. Material: high-quality material, known for its tough, abrasion- properties. Features: Magnetizable head (initially weak magnetic) which can be enhanced with a magnet for strong magnetic , facilitating easy pick-up of screws. Application: Ideal for a wide range of uses, from home DIY to professional engineering projects. This set not only boasts exquisite workmanship where each edge precisely locks screws without damaging the screw or screwdriver head but also offers practical versatility in numerous scenarios. Enhance your tool collection with this reliable and efficient security tamper-proof star bit set. Color: As Shown Material: Alloy Steel Package Contents: 11 x Screwdriver bits Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.