mark cut lines on glass panel
run cutter across width of glass
smooth edges of glass insert with rubbing stone
Scribe the Glass
Mark your cut lines on the glass panel. Use a T-square and a glasscutter with carbide wheel (Image 1) to scribe the glass.
Run the cutter across the width of the glass. Put the tapping ball under the scribe (Image 2), apply a bit of pressure and the glass will snap off.
Do the same thing for your vertical cut. It's okay if it breaks off in several pieces. If there is a small piece left, use the teeth on the end of the cutter to break it off.
Smooth the entire length with a rubbing stone (Image 3).