I used this for seasonal outdoor outlets. I mounted a 4 channel relay board and network power supply into the box and cut 4 holes for sockets in the lid. It has a thin rubber gasket in a channel around the lid to seal the box. The screws for the lid are made of the same plastic as the box and are sufficient if you don't over tighten them. The walls of the box are thin but strong, through the plastic you can see the red glow of the LED mounted on the relay board inside. Overall very happy with this product. It serves its purpose very well.