This is an extremely useful tool for anyone working with Styrofoam dioramas or a model railroad layout.
This cutter is used to cut Styrofoam sheets. You start with a standard piece of Styrofoam insulation and you can adjust the thickness of the Styrofoam sheet that you wish to cut out.
In fact, you can cut incredibly thin pieces on each pass.
What is shown is an inexpensive model that was made from scrap. It was intended as a mockup but it works so well that we use it without spending the time to make a more pleasant looking version.
This video will show you how to make it and how it works.