It Has Set Screw for Locking Fixture Stem; Protects Fixture Against Wind and Vibration Damage; Dual Function - Conduit Outlet Box and Fixture Hanger; Can Be Wired at Work Bench; for Added Protection Where Lighting Fixtures Are Subjected to Vibration
"2.495 in Length X 1.856 in Height, 1 in Knockout,

• Special Features: "2.495 in Length X 1.856 in Height, 1 in Knockout, It Has Set Screw for Locking Fixture Stem; Protects Fixture Against Wind and Vibration Damage; Dual Function - Conduit Outlet Box and Fixture Hanger; Can Be Wired at Work Bench; for Added Protection Where Lighting Fixtures Are Subjected to Vibration
• Material: Malleable Iron With Steel Cover