What is a Electric torque wrench?

An electric torque wrench (nut runner) is an electric tool that can semi-automatically tighten bolts and nuts to a specified torque. It plays the role of an electric socket wrench and a torque wrench at once, and can tighten bolts and nuts at high speed to the specified torque, dramatically improving work efficiency. It can be roughly divided into four types: those that can set the torque suitable for the target bolt and nut, those that manage the tightening torque by angle, those that manually stop the operation when the specified torque is reached, and those that are automatically tightened to the temporary tightening torque and then manually tightened to the specified torque.

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