FOUR TOOLS IN ONE: The Bosch GAM 220 MF can be used as a angle finder, miter calculator, protractor and level. MEMORY: The angle finder provides angle memory, to provide the same angle measurement in different areas of the jobsite. DISPLAY: Easy-to-read illuminated, rotating flip display. The miter cut calculation has an input measurement from 0-220 degrees. DURABLE: Features robust housing with IP54 protection, making the angle finder water and dust resistant. LEG EXTENSION: The angle finder is extendable up to 16 inches long.