3/8" DRV Ratchet Head Micrometer Torque Wrench 20-100 ft-lb

Calibrated to +/- 3% clockwise direction and +/- 6% counter clockwise 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