1、冲击电动扳手：主要是初紧螺栓的，它的操作简单，就是对准螺栓扳动电源开关就行。

1. Impact electric wrench: mainly used for initial tightening of bolts, its operation is simple, just align the bolt and pull the power switch.

2、电动扭剪扳手：主要是终紧扭剪型高强螺栓的，它的使用就是对准螺栓扳动电源开关，直到把扭剪型高强螺栓的梅花头打断为止。

2. Electric torsion shear wrench: mainly used for final tightening of torsion shear high-strength bolts. Its use is to align the bolt and pull the power switch until the plum blossom head of the torsion shear high-strength bolt is broken.

3、电动定扭矩扳手：既可初紧又可终紧，它的使用是先调节扭矩，再紧固螺栓。

3. Electric fixed torque wrench: It can be used for both initial and final tightening. Its use is to first adjust the torque and then tighten the bolts.

4、电动转角扳手：主要也属于定扭矩扳手的一种，它的使用是先调节旋转度数，再紧固螺栓。

4. Electric angle wrench: It mainly belongs to a type of fixed torque wrench, and its use is to adjust the degree of rotation first, and then tighten the bolt.

5、电动角向扳手：是一种专门紧固钢架夹角部位螺栓的电动扳手，它的使用和电动扭剪扳手原理一样。

5. Electric angle wrench: It is a type of electric wrench specifically designed to tighten bolts at the angle of a steel frame, and its use is similar to the principle of an electric torsion wrench.