Blanking plates are a quick, cheap and effective way to cover holes in ceilings walls and bulkheads. They can also be used over existing holes where down lights are no longer wanted. They can also be used to mount smoke detectors, cameras or pendant lights in the holes where downlights used to be. Also as a tool to temporarily cover holes left by removing old downlights and before fitting the new ones. They prevent rodents, insects, insulation, dust and draughts from entering the room.