Green ring. With the Roto tool portfolio, a wide variety of materials and indications can be produced using the Ceramill milling system. The tools, developed specifically for the Ceramill line, enable the highest levels of restoration quality. Particular attention was paid during development to synchronizing the milling and grinding pins throughout the entire process. To ensure maximum economic efficiency, the tools are continuously monitored for their service life and are optimized in the system using newly developed, intelligent milling and grinding strategies. High precision ensures the highest levels of restoration quality.