The BeadBuster XB-550 HEAVY DUTY is the big brother of the original XB-450. All of the 45X series tools have the same design geometry, the 550 is larger in every way.Heavier steel, thicker walls, more extension; the 550 was designed to handle the BIG tires that you'll find on farm tractors, agricultural and industrial OTR wheels, large trucks, military vehicles, etc. However, we created a patented configurable ram foot that can accommodate a large range of rim lip sizes, and it will still work on ATV/UTV. Its still far more portable than any other large tire bead breaker, and much less expensive. Small enough to break the back-side bead of a tractor tire without removing the wheel! If you are a farmer, business owner, or a large vehicle enthusiasts; you can now can easily change your own tires whenever, and wherever you want.