Fulton F2 New Generation Trailer Jack New generation of jack technology. Brings together advances in material technology. Every feature has been re-designed, resulting in 9 patent-pending innovations. Makes every other jack in its class obsolete. Precision extruded aluminum alloy inner and outer tubes combined with twin alignment bushings ensure a precision fit. The anodized finish keep the tubes virtually corrosion free. Engineered to be the strongest swivel mechanism in the industry. it also has the first mounting system that can be adjusted to any desired height. An integrated pull pin with an ergonomic grip makes it easy to swivel into position. Twin track 7" diameter wheels are designed to roll independently and make changing direction smooth and effortless. A wider wheel base adds superior stability. It easy to swivel into position For lifting or transport.