Snap-On Torqometer

Torque wrenches are great but they also need to be accurate. I am a machinist in a large manufacturing plant and all my tools are calibrated annually. The maintenance department has many torque wrenches and they too are required to be calibrated annually. I'm not sure how they calibrate them, I would guess with some type of pull meter that has a given known resistance. An inaccurate torque wrench can do more damage then good.