Adjustable wrenches are designed to fit and grip many applications including automotive, plumbing and general assembly. It has a jaw with one side fixed, while the other is adjustable via a knurled screw that makes it easy to change the size of the opening. Typical styles found in this type of tools are monkey, crescent and chain. The brands we offer are built tough and durable to withstand most jobs, plus the knurled screws are designed to be easily adjusted yet stabilize the jaw to prevent movement during use.