Keyhole Fittings Keyhole Fittings We designed this custom hardware so that our Lamp Bases can be easily connected to a standard octagon electrical box - with a twist, the inclined plane of the slot locks tightly against the machine screw heads in the electrical box. Studio Featured Non-Ferrous Metals Lamp Base Parts, StudioJeremy BoyleFebruary 26, 2020Non-Ferrous Metals, Lamp Base Facebook0 Twitter Pinterest0 0 Likes