Designed to be used with the CornerMaster 7 Corner Rounder, the R6 (1/4”) cutting die is the most commonly used radius when corner rounding. The R6 cutting die can be used to round the corners of all your paper and plastic covers, postcards, business cards, soft-cover books, etc. It works with all standard materials such as paper, PVC, polyester and other paper or plastic based products, cutting up to 3” at a time. Dies for the CornerMaster 7 are also available in 1/16”, 1/8”, 5/32”, 3/16”, 9/32”, 5/16”, 3/8” and 7/16” radii. These interchangeable dies are quick and easy to switch out.