Wide ApplicationsThe angle finder/protractor provides fast and accurate measurements in woodworking, construction, machinery, telecommunications, automotive, etc. Gauge to any steel object. It is especially easy to measure helicopter pitch, miter saw bevel angle, automotive test and repair, etc. 4 Magnetic Sides Powerful built-in magnets on the base secure the attachment to any iron surface. Big EBTN LCD Display (Enhanced Background Twisted Nematic) enhances greatly enhance the reading experience, illuminated numbers and letters on a black background make it very easy to read even in direct sunlight or low light. Small and Lightweightit's really easy to carry and use. Multiple FunctionsDisplay reversed automatically when head downAuto power off after 3 minutes idleClear function, low power prompt and function calibration.