Features: * 100% brand new and high quality. * Suitable for air screwdriver and ordinary hand electric drill. It is mainly used for assembling and disassembling hexagon head screw and hexagon nut. * It is made of high quality chrome vanadium steel, hardened by high temperature heat treatment, hardness above HRC60, not easy to be deformed and worn, and durable. * With a strong magnetic core, it can absorb screws for easy disassembly and installation of hexagon screws and nuts.* Hex shank increases clamping force and is widely used. Technical data: Material: chrome vanadium steel Color: metallic Hardness: HRC60 Total length: 80 mm Diameter: 5.5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm ,13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm (Optional) Package Contents: 1 * Hex Sockets