The newest version of the SureFit Ultra Slim Surface Mount LED Downlight features increased lumen output and efficiency while keeping the same installation compatibility. The DLF will fit most standard 4/O, 4” non-metallic new construction or remodel J-Boxes. Mount the fixture directly to the J-Box using the keyhole mounting slots and two screws. Detachable round steel trims and square die-cast aluminum trims offer a seamless finish in both round and square apertures to enhance the visual aesthetic of any living space. The SureFit is the perfect solution for residential and light commercial spaces including living rooms, bedrooms, home theaters, corridors, office, retail and more.