Review on 📏 Alumicolor Alumicutter: 36" Aluminum Safety Ruler & Straight Edge - Silver (1316-1) by Gelin Battle

Just right for cutting foam board with an Exacto or Stanley disposable knife. If it wasn't clear, there are two important features. Firstly, if there is a non-slip strip on the bottom. And it has a distinct finger dimple and a thick ridge along one edge. The combination of these two features allows you to apply enough pressure to hold the ruler securely in place while cutting. You're unlikely to slip and get your fingers in the way of the blade, and it won't slip. This is especially important for styrofoam as you need to make two cuts to get a clean edge and obviously the ruler can't move between them.