This 3/8” drive calibration device can be used as a Torque Wrench and/or a Torque Calibration tool. It converts any ratchet into a torque measuring tool, and it can also be used to re-calibrate any type of torque wrench within 3% accuracy. The torque range is 6-59 Ft lbs, and the units of measurement are: Kg-CM, Kg-M, In-lb, Ft-lb, and N-m.  The tool has a LED backlight, memory function, peak mode, audible torque meter & automatic shut-off.