Electric fixed torque wrench

           Electric wrench is mainly used in the steel structure installation industry, specializing in the installation of steel structure high-strength bolts, high-strength bolts are used to connect steel structure contacts, usually in the form of bolt groups. High-strength bolts can be divided into two kinds of torsional shear type and large hexagonal type. The national standard torsional shear high-strength bolts are M16, M20, M22, M24, and now there are two kinds of non-national standard M27 and M30. The national standard large hexagonal high-strength bolts are M16, M20, M22, M24, M27, M30 and so on. Generally, the tightening of high-strength bolts should be tightened first and then finally, and each step needs to have strict torque requirements. The fixed torque wrench must be used for the initial and final tightening of large hexagonal high-strength bolts.