4" square box swivel hangers with a hinged cover door for 1/2" or 3/4" pipes are used to hang light fixtures, security cameras, speakers and other electrical/electronic devices from standard 4” square junction boxes. They require no extra mounting boxes and hangers, and allow a 20° swing from vertical. They are great for industrial settings where conduits are bumped or jostled occasionally. The hinged door allows the installer to mount the cover on box and hang fixtures in one easy step. Wire termination can be completed with the door open, hands free labor saving install, fixture hanging is now a one man job!