The new Jungle Jack is constructed with the same qualities that other Jungle Jim products offer. It is made of steel box tubing for durability and long life. The Jungle Jack is on file with the U.S. patent Office (#5678804). You can bet there is no other jack that gives you all the features that the new Jungle Jack has to offer. The JJ-Jack4 Jungle Jack has the ability to lift virtually any size commercial mower with ease. Both the front and rear of any mower can be picked up by the new Jungle Jack to help you perform all your maintenance duties. The Jungle Jack rolls on its two wheels, making it very easy to take anywhere you need and service your equipment. Not only does it have bigger tires, but also a large foot assist for heavier mowers.