Didn't think I really needed this tool, as I already had a little corner rounder punch. Boy was I ever wrong. This corner rounder lives up to its name and really "chomps" through thick and thin. I really like the convenience of being able to decide whether to round the corners of my cards after I have made them with several layers of cardstock instead of rounding each layer beforehand. The Chomper makes quick work of rounding the corners even with multiple layers of paper. Cuts chipboard and other stuff, too.