deep jaw serrations Wolff-Boehler Plaster Breaker is an instrument that features deep jaw serrations making it specifically designed for creating force to break through a cast that has been set with plaster. A variety of surgical procedures, specifically those that are intended to repair fractures necessitate that the bones are maintained in a specific alignment as they heal. In order to do this particular regions are set in plaster casts and when it comes time for removal this breaker can effectively aid in that process. This instrument is available in two lengths 8″ and 9.5″.