Features:* The bits are made of high quality s2 solid steel. Black oxide finish for corrosion protection.* Precision 1/4'' hex chuck attaches solidly with electric screwdrivers, screwdrivers, electric drills and air drills.* Bits are marked by size. Clear size markings help you find the right bit instantly.* Magnetic bits increase attachment to screws for a secure grip and can minimize wear on screws and increase work efficiency.* 10 x SAE with 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16". Specifications:Product Name: Hex ScrewdriversMaterial: AlloyColor: BlackMagnetic: Yes Shank: 1/4 Inch (6.35mm Hex)Length: 50mmSize: 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16"Suitable for: Disassembling Hex ScrewsOptional: 10pcs/setPackage Contents:10× Hex ScrewdriversNotes: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.