Toggle clamp - all industrial manufacturers. How to choose this product A toggle clamp is a manual lever clamp used to attach an object to a base. Its mechanism is sometimes called a knuckle joint. Applications These devices are used where clamp points are frequently opened and closed. Examples include machine and transport container covers, vehicle closures and the attachment of workpieces to machine tools. Technologies Such clamps use a variety of mechanisms. Other types use a stirrup clamp mechanism. Most are made of zinc-plated steel or galvanized stainless steel to resist humidity and moisture. How to choose Choice will depend on lever position and the type and degree of force to be applied. Carr Lane. Bibliocad. GabiJack.com.