The lightweight, durable 4 inch one Digital Angle Finder serves as an angle finder, compound cut calculator, protractor and level. It measures angles from 0 degree to 220 degree with an accuracy of + or - 0.1 degree while clearly displaying measurements on the front and rear backlit LCD screen. 4 individual function buttons On or Off, Hold, Spring, Corner, Miter, Bevel and Spring Angle makes it easy to navigate to tool's functions with just a press of a button. A leg extension enables you to reach hard to measure angles and bubble vials provide a quick, vertical and horizontal, level and plumb reference. Weighs 1.7 lbs.