Proto Wrench - 41.5in Length - Alloy Steel, Chrome Steel - 11.60 lb - Slip Resistant - 1

Calibrated to +/- 4% clockwise direction and +/- 6% counter clockwise at 20% to 100% of full scale. Manufactured to meet standard industrial torque applications, general industry, heavy equipment, and maintenance. Calibration is accomplished by manual loading the torque wrenches.