A wrench is a handy tool used to grip and turn nuts, bolts, and other fasteners. It comes in various shapes and sizes, with the most common type being the adjustable wrench, which can fit different sizes of nuts. Wrenches are essential for tasks in plumbing, automotive repair, and construction, making them a must-have in any toolbox. There are also specialized wrenches, like the socket wrench, which uses interchangeable sockets to fit various fastener sizes. Another popular type is the torque wrench, which measures the amount of force applied, ensuring that bolts are tightened to the correct specifications.