Stanley Proto J6065C 3/8-Inch Drive Fixed Head Micrometer Torque Wrench, 200-1000-Inch Pound Calibrated to +/- 3% clockwise direction and +/- 6% and 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