I love that these GFCI sockets have an indicator light to show they are working properly. They are easy to install, even in metal boxes with two Romex wires included in the box. They're not as thick as some I've used, so thickness shouldn't be an issue. However, when I use them in metal boxes, I always wrap 3m of Super 33 electrical tape around the socket because they are quite wide. When I bought them the 4 pack was the best value. Supplied with cover, base and cover screws, marking stickers…