What is the primary function of a wrench?

The primary function of a wrench is to tighten and loosen nuts and bolts. Wrenches are essential tools in mechanical work and construction, allowing users to apply torque to fasteners, ensuring they are securely fastened or easily removed. This capability makes wrenches indispensable in tasks such as automotive repair, plumbing, and assembly of structures where nuts and bolts are commonly used.

Tools such as saws or chisels are designed to cut wood, which makes cutting wood an irrelevant function in this context. Measuring angles typically involves tools like a protractor or square, which are used in construction and woodworking to ensure precision and accuracy of angles, not in the application of torque to fasteners. Drilling holes is performed with drills and drill bits, which are specifically designed for creating holes in various materials rather than adjusting the tension of fasteners. Thus, the function of the wrench stands out distinctly as relating to the manipulation of nuts and bolts.