Torque wrench is used to measure the magnitude of the torque value of a measuring tool including torque meter, rich tools torque wrench, torque driver, it can load at the end of the meter through its own internal mechanism. The international common metric unit is newton-meter N.m, divided by the gravitational acceleration of 9.8m/sec2, the unit can be converted into the kilogram force familiar to Chinese people, meter kgf.m or kilogram force, centimeter kgfNaN. British units are pounds. Feet lb. Ft. To convert to metric, just divide the lb-ft number by 7.22.