Use the Scotty Backing Plate to add structural support when attaching the Scotty No. 241L or No. 241 Combination Side/Deck Mounts or the No. 244L or 244 Flush Deck Mounts to a thin-walled watercraft. Made with super tough, rugged engineering grade nylon. It includes stainless steel nuts and machine screws. The stainless steel Nylock nuts are retained in the plate for ease of installation.