Meets all U.L. 20 requirements. Longer, wider strap provides 40% more contact area to wall board. Virtually eliminates floating installations. Industrial design cam action mechanism insures quiet switch action. Patented built-in wire stripper for #14 and#12 wire to speed installation. Patented built-in wire looper for pre-looping. Double riveting of switch for superior assembly security. Three way switches feature additional push-in common termination for feed-through tapping. Push-in terminals accept #12 or #14 solid wire only. Side wire terminals accept up to #10 solid or stranded wire. Combination slot/Phillips head mounting and terminal screws ease installation with power screwdrivers.