Why is it?

I do not have a lot of punches. I am in the process of slowly getting the Marvy Uchida set of the giga, mega and so on. I have wanted a set like that for a long time. I've been waiting for coupons, to get them at 50% off, one by one, so I don't break my budget. I currently have 10, out of a possible set of 32. I'm trying to start with the larger ones and gradually work to the smaller ones.

Today, what I was afraid of has happened. I need a punch that I don't have and didn't have plans to purchase any time soon. Drat. Time to come up with a work-around.