What is a crescent wrench?

A crescent wrench, also known as an adjustable wrench, is a versatile hand tool used for gripping and turning nuts and bolts. The movable jaw of the wrench can be adjusted to fit a range of sizes, making it useful for a variety of tasks. The name "crescent wrench" comes from the shape of the head of the wrench, which resembles a crescent moon.

Crescent wrenches are commonly made of steel and have a chrome or nickel plating to prevent rust and corrosion. They typically have a knurled thumb screw or worm gear that allows for easy adjustment of the jaw size. Some models may also have a scale or markings to help accurately set the jaw size.

Crescent wrenches come in various sizes, ranging from small handheld models to large heavy-duty wrenches for industrial use. They are a staple tool in many toolboxes and are commonly used in automotive repair, plumbing, and general construction.