Grinds all current lens materials including Polycarbonate accurately and quickly. Yet, the Model e6.20T cuts out both plastic and mineral glass lenses at high specializing in each material. A built-in controlled beveling unit allows you to fine-tune the bevel placement on hight-power lenses. Three-degrees head pressures can be selected according to the style of lens. An anti-foam coolant system (water tank & pump) is standard.