50 Amp 125V/250V RV Power Outlet Box is designed for providing safe and reliable power for your RV or camper. Lockable anti-theft cover not only protect the outlet from rain or snow, but also avoid electric shock to ensure children safety. No need to take effort to get the knockouts open. Five pre-reserving holes distribute on top, bottom, side surface. Three standards apertures are provided: 1/2 inch, 3/4 inch, 1 inch. Easily screw the gasket, never deal with the troublesome knockouts! There is enough space to close and lock the door even when plugged in a big handle RV plug or 6 gauge wire.