Glass Cutter

A glass cutter is a tool used to make a shallow score along one surface of a flat piece of glass that is to be broken into two pieces, such as when cutting a pane to fit a window or a stained-glass pattern. The scoring tool, typically a small hardened-steel or tungsten-carbide wheel set in a handle, does not saw through the glass; it creates a thin split in the glass's surface that gives the sheet a weak line to break cleanly along when flexed. A glass cutter of this kind is a distinct tool from the equipment used to grind or facet cut glass objects, which is a separate decorative technique rather than a way of dividing a sheet of glass.