If you want your counters to be clipped, and clipped consistently, this is the way to do it:
It’s a tool used in the print industry, to put rounded corners on material. One gamer spotted its potential to clip counters, and it has caught on like wildfire. So much so, I understand, that the manufacturers tweaked their design to accommodate this new market.
This was the first that I had seen one in the flesh (so to speak) and I must say it was impressive. It is easy to use, and so much better than hacking away with a sharp knife like I do.
I do not have one. Yet.