Stanley Proto J6006MC 3/8-Inch Drive Ratcheting Head Micrometer Torque Wrench, 16-80Nm Calibrated to +/- 3% clockwise direction and +/- 6% counter clockwise direction at 20% to 100% of full scale Calibration is accomplished by manual loading the torque wrenches Manufactured to meet standard industrial torque applications, general industry, heavy equipment, and maintenance