Great for breaking flat glass once it has been scored. Smooth, flat Jaw removes flares and tiny pieces of glass. To Break out a score, hold the glass firmly to one side of the score line with the pliers, hold the glass opposite from the score line with your other hand: Bend to Obtain a Clean Break. You will have more control over how your glass breaks if you squeeze gently, applying pressure in small, increasing amounts till score runs. (Squeezing too hard may cause Glass to Chip or Shatter)