Meets all UL 20 requirements. For direct connection to aluminum or copper wire. Longer, wider strap provides 40 percentmore contact area to wall board. Virtually eliminates floating installations. Industrial design cam action mechanism insures quiet switch action. Side wire terminals accept up to #10 solid or stranded wire. Terminal screws are backed out-ready for wiring. Combination slot/Phillips head mounting and terminal screws. 15 amp, 120 volt. UL Listed.