Factory Certificate of Calibration—a Must-Have Document A torque wrench should include a certificate of factory calibration. This proves that the tool has been inspected and tested at the ...

Ours came with a calibration certificate showing an outstanding 0.1% accuracy at 50-lbs.ft, 0.3% at 150-lbs.ft, and 1.3% at 250-lbs-ft.. The Icon torque wrench has a satisfying spring-loaded (and ...