The Craftsman LED lighted adjustable wrench offers convenience， versatility， and comfort. If you're working in a dimly lit work environment， you won't have any problem grabbing the tool. The integrated dual LED lights improve visibility and eliminate the need for a separate light source. This wrench has an wide-mouth design for works on fasteners up to 1-5/16 inch or 33mm and dual material handle cushions hands and helps prevent slipping.