Coluzzle by Provo Craft. Enjoy precision cutting with this totally new approach to cropping shapes without measuring, tracing or handling cumbersome tools. The Guarded Swivel Knife has a uniquely designed guard that prevents the swivel blade from scraping and nicking your Coluzzle templates and helps to center the blade into the template channels. Used with the Easy Glide Cutting Mat, you can cut perfect shapes with unmatched ease and accuracy.