Features: * . * Suitable for pneumatic screwdriver and ordinary hand-held electric drill. It is mainly used for mounting and disassembling hex head bolt and hex head nut. * It is made of high-quality chrome vanadium steel, quenched by high temperature heat treatment, hardness above HRC60, it is not easy to be deformed and worn, and . * With strong core, it can absorb the bolts for easy disassembly and installation of hex bolt bolts and nuts. * The hex chuck increases the clamping force and is widely used. Specifications: Material: chrome vanadium stainless steel Color: metallic Hardness: HRC60 Total length: 80mm Diameter: 5.5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm ,13mm,14mm,15mm,16mm,17mm,18mm,19mm (optional) Package Contents: 1 * Hex Sockets