I bought one of these sets, used it up and bought another. The original sentence did not count. I have no plans to consider a new one (it's too boring). I didn't count the number of uses I've had. But I'm pretty sure it was more like 300 than 400. I ended up having over a dozen most when I ran out of pucks. I'm pretty sure I've never lost a puck or doubled down. Thus, the original values did not match. I also used a tool to cut holes in plain fabric with a soft wood back. This should have extended the life of this tool, but it wore out in less than half the life of the kit (too boring to keep using) and I had to switch to a different punch. The end results were good (unlike the cheaper grommet system I used years ago but the results fell apart). So I am not satisfied with this product. But even if it were really only 300 (and not 400), I can't find a better unit price on the internet. So when it ran out I bought another one.