Not good for card stock, only for things like chipboard and leather.
Bought this because I thought it would be great to have one hole punch instead of 5 or six for the different hole sizes. It is basically a leather punch without the metal plate on the other side. It puckers card stock when you try to punch with it, and it takes lots of muscle and twisting the paper to get it to work. It really was a waste of my money. After I bought it, I relized I could use my crop-a-diles to do the same thing. Oh well, hopefully someone else can learn from my mistake.