The Zutter Round-it-All R10 is designed to handle thick chipboards, acrylics, woods, tins, and most other materials up to 1/8 inches thick. and Its ergonomically designed structure enables corners to be rounded off with ease. The Round-It-All is available in two sizes - this R10 which cuts a 10mm radius corner and the R5 (ref: ZT2805) which cuts a 5mm radius corner.

Jens' thoughts:- Yes, it is a lot of money for a corner rounder, but it is a great tool tool. With the usual corner rounder I could only shape the outside corners of a card or mini album. With this gadget it is no problem at all. On thicker material it is as easy to use as the crop-a-dile. It cuts trhough metal, plastic and chipboard and  I tried the blue version but prefer this one as it gives a reasonable size corner. Only proble I did find was with the acrylic covers they had a tendency to chip.