Which tool is used to apply a calibrated amount of torque to fasteners?

• A. Torx Screwdriver
• B. Tachometer
• C. Wire Stripper
• D. Torque Wrench

Answer: (D)

The main idea is using a tool that delivers a precise, set amount of turning force to a fastener. A torque wrench is built for this purpose: you dial in the required torque, and the tool measures the resistance as you tighten until the target is reached, often giving a tactile or audible indication (like a click) or showing a reading. This calibration ensures the fastener is tightened enough to create the proper clamp preload without over-tightening and risking damage or failure. Other tools don’t provide this controlled torque capability— a Torx screwdriver drives a screw but isn’t calibrated for a specific torque; a tachometer measures speed of rotation, not the tightening force; a wire stripper has no role in tightening fasteners.