Features:* The accuracy and durability of this kit meets higher standards. Use them for DIY home projects or workplaces.* With magnetic, the parts adopt a strong permanent magnet that can fix the screws firmly. Perfect spot every time.* Standard shank diameter, 6.35mm opposite side hex chuck, 1/4 standard shank diameter, suitable for all kinds of pneumatic screwdrivers, electric screwdrivers and cordless screwdrivers.* Straight and concentric angles can effectively reduce the phenomenon of bit swaying.* Made of high-strength S2 alloy steel, with high hardness, strong twisting, long-term use.* Improved anti-corrosion and better storage, The surface adopts special anti-corrosion surface treatment. Specifications:Product Name: Screwdriver BitMaterial: Alloy Steel S2Type: Torx T20Color: Gray Overall Length: 50mm/1.97" (Approx.) Shank Type: 6.35mm/1/4 inch Hex Head Suitable for: Removing Hex Screws Quantity: 10 Pieces Package Contents:10 × Torx Screwdriver BitNote:1. Transition: 1cm=10mm=0.39 inch.2. The actual colors 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.