Impact resistant polycarbonate back body and frame. Cushioned thermoplastic paddle assures smooth, quiet, long term operation. Single rocking butterfly contact provides long term consistent performance with significantly fewer moving parts. Internal screw pressure plate back and side wire capability for easy installation with #14 # 10 stranded or solid copper/copper clad wire. Terminals made of high conductivity brass and serrated for maximum wire gripping. Silver alloy contacts integrally formed to the butterfly actuator assures reliable performance. Integral auto ground clip for positive ground to metal boxes. Tridrive ground, terminal, and mounting screws. All terminal screws backed out, ready to install.