Lithium electric wrench refers to an electric tool used to tighten and loosen bolts and nuts, and is a tool for tightening high-strength bolts. 

Used for tightening large hexagonal high-strength bolts and initial tightening of torsional shear type high-strength bolts for steel structure bridges, road guardrail infrastructure, factory buildings, chemical engineering, and power generation equipment installation, as well as occasions with strict requirements for the torque or axial force of bolt fasteners.