Wrenches and spanners ideal for tightening and loosening hexagonal and square screws and nuts, the Tramontina PRO wrenches and spanners are made with fine raw materials, which ensure high resistance. For optimum performance, it's important to use the compatible standard size with the bolt or nut head. It's the right tool for everything from civil construction to small repairs. With the Tramontina PRO wrenches and spanners you shouldn't worry about a thing. Only a screw would.