Delphi Cutting Tip:
To hold the pistol grip glass cutter, place your thumb on the top of the handle just above th cutting wheel and curl your remaining fingers underneath the handle.

Line up the cutting wheel with the intended score line at a slight downward angle, apply moderate pressure to the cutting wheel and push away. A good score begins at one edge of the glass and runs to the other edge. It should look like a piece of hair on the glass. If it looks like salt, you've pressed too hard.