They have used these receptacles in RV's for over 30 years or more. NO PROBLEMS. I use a simple 16 inch Channel lock pliers to snap the back on the receptacle. You use a flat plate on the plug side to prevent marring. You do NOT have to use the specialized expensive tool. I also use a needle nose pliers to push the wires into the teeth of the receptacle prior to installing the back lock plate. When you do this, the back plate usually just easily snaps in place. It depends on how many romex wires are being installed in the receptacle. Doug