One would assume that a metal ruler would work great for guiding a glass cutter, but we strongly advise against it! Rulers tend to be thin and can catch the wheel of your cutter, ruining your score. We recommend using a cutting bar, or in this case, a wooden square - The thickness will guide your cutter, and the shape of it will set up perfect ninety-degree cuts.
Sal ammoniac demo - keep your solder iron tips clean
Strip cutter demo
Fume trap/smoke hood demo
Foiling machine demo