Sea-Legs are the world's only portable hydraulic pontoon lift. The product consists of two hydraulically operated lift modules (or legs) that are attached to the bottom of the pontoon deck. The Legs lift and hold the boat at any height, up to six feet, from the lake or river bottom. When fully retracted under the deck, your pontoon is fully functional until you get to your next destination. To secure your boat, simply extend the Sea-Legs.