Stanley J6065C Proto 3/8-inch Drive Fixed Head Micrometer Torque Wrench 200-1000 in-lbs. 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.