Garvin Industries 6" Square Covers & Raised Device Rings are used to close up electrical boxes or mount electrical devices, receptacles and light fixtures to the steel boxes in walls and ceilings.  Flat covers come in a blank style and a conversion plate that will adapt the 6" square box to accept standard 4" square and 4-11/16" square device rings.  They are offered in one gang & two gang styles with a range of depths that will accommodate finished wall surfaces from flat to 2" deep.  One gang and two gang versions have mounting tabs threaded for 6-32 machine screws to accommodate most standard wall receptacles, devices, and switches.  They are made from rugged, galvanized steel.