F2 Dual Track JackIncludes handle and wheel chock clamping features, and bolt-on mounting hardware for 3x3-inch and 3x4-inch frames.Fulton's F2 is designed for use with marine, recreational and utility trailers, continues that Fulton heritage of innovation by rethinking every feature and challenging industry conventions. The result is a redesigned, high-quality product that will transform the industry. It's so strong and reliable, Fulton backs it with an unprecedented limited lifetime warranty. Maintenance Free - Designed to eliminate the need for lubrication and maintenance. Corrosion-resistant coatings cover internal and external components, they'll hold up in saltwater and other harsh environments. Ergonomic Design - The crank handle, release pin and integrated wheel chock are all made of strong plastic designed for a comfortable feel. Sleek design: complements your boat and personalizes the style of your trailer. One-piece sealed and lubricated gearbox.