Inexpensive and highly durable, these hinged covers live up to their name and can be used in a wide range of applications. Bopper Stopper can take hard knocks in stride while protecting digital keypads, electrical outlets, smaller-size pull stations, biometrics, volume or lighting controls and push buttons to name just a few. The covers and hinges are molded of super tough polycarbonate material. The devices feature a stainless steel torsion spring to keep the cover closed (excludes STI-6528). Bopper Stoppers come complete with installation screws and gasket.