Which tool is essential for adjusting and holding screws tightly in place?

The torque wrench is specifically designed to apply a precise amount of torque to a fastener, such as a screw or bolt. This tool is essential for ensuring that screws are tightened to the manufacturer's specifications, preventing them from being overtightened or undertightened, which could lead to mechanical failure. The torque wrench provides a measurable amount of force, allowing users to achieve the desired tightness for the fastener without damage to the components involved.

In contrast, a socket wrench is typically used for turning nuts and bolts but does not provide a way to measure the amount of torque applied. A ratchet wrench allows for continuous turning without removing the tool from the fastener but also lacks torque measurement capabilities. The torque driver, while related, is generally more specialized and focused on driving screws rather than measuring and adjusting torque levels in the same way a torque wrench does. Thus, for the specific task of adjusting and securely holding screws in place with the correct torque, the torque wrench is the most appropriate tool.