Torque Wrench Calibration at Zenith Sales & Calibration would refer to the service of ensuring that torque wrenches—tools used to apply a specific torque (force) to fasteners such as bolts or nuts—are accurately calibrated. Accurate torque is critical in many industries, including automotive, aerospace, manufacturing, and construction, as it ensures that components are tightened to the correct specifications, preventing over-tightening or under-tightening.