Sea Swivel XL Trolling Motor Mount [SEA-HDM-TMM-XL]XL Trolling Motor Mount The Sea Swivel XL trolling motor mount is designed for trolling motors 100" and greater and has a larger surface area (10" X 10") and backing plate (10" X 10") than the standard model. The larger size distributes the load to a larger surface area of the fiberglass. The patented Sea Swivel is a rotating trolling motor mount designed to pivot a trolling motor to the correct position while deployed. Also, it has the benefit of