Out of necessity a few years ago, I decided to make a better paper and cardboard cutter. I had mat knives and they worked well, but blades are expensive, and I always seemed to have many dull ones and then didn't want to make a store run. Solution: make a holder for the standard box cutter. Goal was to make a tool that would hold the cutter so as to avoid any angled cuts on the cardboard, one that would cut a precise, straight cut line, and, perhaps most importantly, use the regular cheap one edge razor blades that can be purchased in bulk. I have found them at swap meets very cheaply, but even retail is about 5 cents a blade.
Step 1: Tools and Materials
I use plain pine lumber, cut to shape as shown. Follow the pictures and cut the pieces as indicated. I wanted the final piece to fit my hand, so I angled the blocks and sanded everything down to round of any sharp edges. I used the table saw, bandsaw, sander, and drill press in the production of these pieces.