897 Ball Type, KWIK-HANGTM Hands-Free Swivel Fixture Hanger Cover. 4 in. square. RACO KWIK-HANG Swivel Fixture Covers help protect commercial lighting fixtures from limited wind and vibration damage. Allows one person alone to hang a high bay lighting fixture. Unique, open gate design allows for easy installation of high bay lighting fixtures. Permits 20 degree swing from vertical. Accommodates either 1/2 or 3/4 straight thread stem sizes. 1/2 reducer bushing is included. Designed for 50 lbs. maximum fixture support (not designed for ceiling fan support).