A wrench is a hand tool used to grip, turn, or apply torque to various objects, typically nuts and bolts. It comes in various shapes and sizes, with the most common types being adjustable wrenches, socket wrenches, and combination wrenches. Wrenches are essential in mechanical work, construction, and automotive repair. The design of a wrench allows it to fit snugly around fasteners, providing leverage to tighten or loosen them. Some wrenches, like the ratchet wrench, have a mechanism that allows for continuous turning without needing to reposition the tool. This makes tasks more efficient and easier to complete.