The way to use it is to adjust the torque value of DU on the wrench Bai. When the bolt is locked with a wrench, when the torque value reaches Zhi, it will make a click. At this time, Dao should loosen the bolt immediately to avoid over twisting.

力矩扳手就是紧固螺栓的，高强螺栓可分为扭剪型和大六角型两种，国标扭剪型高强螺栓为M16、M20、M22、M24四种，现在也有非国标的M27、M30两种；国标大六角高强螺栓为M16、M20、M22、M24、M27、M30等几种。一般的对于高强螺栓的紧固都要先初紧再终紧，而且每步都需要有严格的扭矩要求。

Torque wrench is used to fasten bolts. High strength bolts can be divided into torsion shear type and large hexagon type. There are four kinds of national standard torsional shear high-strength bolts: M16, M20, M22 and M24, and now there are non-national standard M27 and M30; national standard large hexagon high-strength bolts are M16, M20, M22, M24, M27, M30, etc. Generally, the tightening of high-strength bolts should be first and then final tightening, and each step needs to have strict torque requirements.

力矩扳手又叫扭矩扳手、扭力扳手、扭矩可调扳手，是扳手的一种。按动力源可分为：电动力矩扳手、气动力矩扳手、液压力矩扳手及手动力矩扳手；手动力矩扳手可分为：预置式、定值式、表盘式、数显式、打滑式、折弯式、以及公斤扳手。

Torque wrench, also known as torque wrench, torque wrench, torque adjustable wrench, is a kind of wrench. According to the power source, it can be divided into electric torque wrench, pneumatic torque wrench, hydraulic torque wrench and manual torque wrench; the manual torque wrench can be divided into preset type, fixed value type, dial type, digital display type, sliding type, bending type and kg wrench.