"Torque" should be called "torque" and "rotational torque" in physics, which is the moment generated when an object is subjected to a tangential force with the direction of rotation of the object. The commonly imported product is Tohnichi torque wrench (now Tohnichi Also set up factories in China to assemble), Dongri torque batch (Dongri torque screwdriver), torque meter, electric batch torque tester, bottle cap torque tester to measure. Because of the misrepresentation of the result, everyone calls it "torque". Simply put, torque = force multiplied by the moment arm. For example, the moment arm (that is, the wrench) is 1M long, and a force of 100N is applied, and the torque is 100N.m. The concept of torque has been explained since the "Leverage Principle" in elementary school, which is defined as "the vertical force multiplied by the distance from the center of rotation".

The international general metric unit is Newton.meter N.m. After dividing by the gravitational acceleration of 9.8m/sec2, the unit can be converted into kilogram force.meter kgf.m or kilogram force.cm kgfNaN which is familiar to Chinese people. Imperial units are lb.ft. lb.ft. To convert to metric, just divide the lb.ft number by 7.22.