Features: *The accuracy and durability of this screwdriver 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. *Made of sturdy Alloy steel, high hardness, strong torsion, long-term use. Specifications: Product name: Screwdriver Bits Material: Alloy Steel Color: as picture show Length: 25mm / 1Inch 3Types: (optional) SET1:PH0 PH1 PH2 PH3 SL3 SL4 SL5 SL6 SET2:H1.5/2/2.5/3/4/5.5/6 SET3:T8/10/15/20/25/27/30/40 Shank: 1/4 Inch Hex Magnetic: Yes Suitable for: electric drills with speed regulating device, electric screwdrivers, hand screwdrivers Quantity: 1Pc Package Includes: 8PCS/SET Screwdriver Bits Notes: 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.