1 Pcs 80mm Length Extra Deep Bolt Nut Driver Bit 1/4 Inch Hex Shank Wrench Socket Screw Driver For Power Tool 55-19mm Features: * brand new and high quality . *It is suitable for pneumatic screwdriver and ordinary hand electric drill. It is mainly used for installing and disassembling hexagonal head screw and hexagonal head 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 . *With a strong core, it can absorb screws for easy removal and installation of hex head screws and nuts. *The hex shank design increases the clamping force and is widely used. Specifications: Material:chrome vanadium steel Colour: Hardness:HRC60 Total length: 80mm Diameter:5.5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm ,13mm,14mm,15mm,16mm,17mm,18mm,19mmoptional Package Contents: 1*Hex Sockets _x000D_ _x000D_