Breaker-grozier pliers are pliers that have a curved jaw below, and a flat jaw above, both with finely serrated edges. They are mainly used by glaziers for breaking and finishing small glass pieces that can fit into the jaws of the pliers in at least one dimension.
Use
The piers have a dual purpose. To break scored fracture glass without fracturing it, the glass is held firmly with the flat jaw of the pliers up near the score line. A sharp bend downward breaks the score. To remove unwanted glass flares, the glass piece is held with one hand with the pliers curved side up. A gentle upward rolling scrapes the glass edge (grozz) against the serrated teeth removes unwanted glass flares.
