Which tool can be used for measuring body alignment?

The frame measuring gauge is specifically designed for checking the alignment of a vehicle's body structure. This tool allows technicians to measure deviations in the frame and body panels from the manufacturer's specifications. By using a frame measuring gauge, a technician can accurately determine if the vehicle’s structure is straight or if it has sustained damage that needs to be corrected during the repair process.

In the context of auto collision repair, maintaining precise body alignment is vital for the vehicle's safety and aesthetics, making the frame measuring gauge an essential tool for this purpose. Other options, such as a torque wrench, paint thickness gauge, and caliper, serve different functions in the repair process, but they are not suited for measuring body alignment. A torque wrench is used for tightening fasteners to specific torque settings, a paint thickness gauge measures the thickness of paint to detect potential issues or verify repairs, and a caliper measures dimensions or distances but does not provide the alignments required for body repair. Therefore, the frame measuring gauge stands out as the appropriate tool for this specific measurement task.