Electric wrench is a handheld electric tool used for loading and unloading threaded connectors. It is widely used in the assembly work of manufacturing industries such as automobiles, tractors, electric motors and appliances, power machinery, valves, water pumps, textile machinery, etc. In chemical engineering, cement prefabricated parts, plastic molding and other operations, it is used for assembling and disassembling vacuum tanks, reaction kettles, cement templates, and demolding of threaded plastic parts in the production process; It can also be used for the installation, maintenance, and replacement of cement sleepers, truss nodes, angle steel scaffolding and other structures in railway, bridge, construction and other engineering projects.