Sea Swivel XL Trolling Motor Mount [SEA-HDM-TMM-XL]XL Trolling Motor Mount The Sea Swivel XL is designed for trolling motors 100"+ and has a larger surface area (10" X 10") and also a larger backing plate (10" X 10"). They distribute 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 adjusting the stowed position to match the angle of every