A wrench is a simple yet essential 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 fasteners. Wrenches are made from strong materials like steel, ensuring they can handle tough jobs without breaking. There are many types of wrenches, including socket wrenches, box-end wrenches, and open-end wrenches. Each type serves a specific purpose, making it easier to work on machines, vehicles, and household items. Whether you're a professional mechanic or a DIY enthusiast, having a good set of wrenches is crucial for any toolbox.