Feature: *The accuracy and durability of this kit meets higher standards. Use them for DIY home projects or work sites. *With magnetic, the parts adopt strong permanent magnet, which can fix the screws firmly. Perfect placement every time. *Standard shank diameter, 6.35mm on the opposite side of the hexagonal shank, 1/4 standard shank diameter, suitable for all kinds of pneumatic screwdrivers, electric screwdrivers, and rechargeable screwdrivers. *Straight and concentric angles can effectively reduce the phenomenon of bit swinging. *Made of sturdy alloy steel, high hardness, strong torsion, long-term use. *Upgraded anti-rust and better storage, the for adopts special anti-rust for treatment. Specifications: Product name: Torx Screwdriver Bits Set Material: Alloy Steel Color: Bronze Length: (Approx. ) 50mm / 1.96'' Shank: 1/4'' (6.35mm) Hex Magnetic: Yes Optional Size: for T10, T15, T20, T25, T27, T30, T40 Suitable for: all kinds of pneumatic screwdrivers, electric screwdrivers, and rechargeable screwdrivers. Quantity: 1pcs Package Included: 1 × Torx Screwdriver Bit Note: 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data.