Winner of the 2007 NMMA (National Marine Manufacturers Association) award for innovation, this is the jack by which others are judgedExtremely robust construction features extruded aluminum alloy inner and outer tubes combined with twin alignment bushings that ensure a precision fit. The anodized finish keeps the tubes virtually corrosion free. Engineered to be the strongest in the industry, the mount/swivel system allows adjustment to any desired height. An ergonomic pull pin makes it easy to swivel up for lifting or transport. Twin-track 7" diameter wheels roll independently, making direction changes smooth and effortless. Lift capacity is 1,600 pounds Provides 23-1/2" of lift and 10" of travel Includes hardware for bolting to a 3" x 3" or 3" x 4" tongue Limited lifetime warranty Mount/swivel system allows adjustment to any desired height Twin-track 7" diameter wheels roll independently, making direction changes smooth and effortless