Product specifications: This lamp mounting bracket kit has three sizes of 4.1 inches 4.5 inches and 4.7 inches and includes two matching screws with complete specificationsMaterial properties: This light fixture mounting bracket is made of iron with strong load-bearing capacity hard material and not easy to deform and will not deform after long-term useWide range of application: This light mounting bracket has a full range of sizes whether it is a chandelier wall lamp or outdoor lighting you can find the right size and it is commonly used for a variety of lamp installationsSimple method of use: When using this lamp mounting bracket just place the bracket between the lamp and the wall and then screw on the matching screws. The operation is simple and convenientNote: The load-bearing capacity of this ceiling light bracket is limited. It can only be used for the installation of small lamps. It cannot bear the weight of ceiling fans and cannot be used to install ceiling fans.