An adjustable wrench is a versatile hand tool used for gripping and turning nuts, bolts, and other fasteners. It features a movable jaw that allows the user to adjust the width of the opening, making it suitable for various sizes of hardware. This tool is commonly made of steel for durability and often has a comfortable grip for ease of use. The adjustable wrench is also known as a crescent wrench, named after the brand that popularized it. It is an essential tool in many settings, including home improvement, automotive repair, and plumbing, where different sizes of fasteners are frequently encountered.