8753 Features: -Square blank box cover with knockout. -Material: Steel. -Used to close an outlet box. -Raised device covers are used for mounting switches or receptacles. -Angled mounting slots compensate up to 12" for box misalignment. -Swivel cover restricted to 20? swing from vertical. -Kwik-hang allows easy installation of high bay lighting fixtures. -Fixture nests in cover while wiring is completed. -UL - File E195978. Specifications: -0.5" Knockout. -Dimensions: 4" H x 4" W x 0.06" D.