Do not bother, there are cheaper fixes!!
I very impressed when I saw this item in the catalogue. I have been looking for a bigger, better, stuck case remover, and this looked like it. Unfortunately, it was back ordered.
When I finally got it, it took a while for me to have a stuck case. I got it out of the case and tried to attach it to my RCBS Rockchucker Supreme. It was fiddely. The bump that the bolt goes into, to tighten the jaws, hit the side of the press. You have to move the jaws until you find the sweet spot and then it will attach.
I then tried to remove the case using the tool and the leverage of the handle. No, luck! I hit the lever with a plastic mallet, no leverage tool available, and it sheared off the case rim.
I then used the RCBS Stuck Case Remover-2 Kit - 607887, Reloading Tools & Accessories.
I took the de-capping assembly out using the RCBS extractor nut. I then sprayed some penetrating oil. I waited ten minutes. Then, I used the extracting rod provided in the kit. A couple of wacks with a four ounce hammer, and the case came right out.
About a month later, it happened again. Same situation. I used the Platinum Tool, it took the rim off. I turned the die around to access a clean part of the rim. It tore that off.
I went back to the RCBS Stuck Case Remover-2 Kit - 607887 and followed the previous procedure. It came right out.
I would not waste the money on this tool.