The user-friendly Angle Guide has computer-controlled, laser etched angles from 0 degrees through 180 degrees in 1/2 degree increments, as well as their complementary angles. Additional features are two height gauges — one in fractional inches and the other in millimeters — which are perfect for setting saw blade or router bit heights. Also included is a handy Angle Chart that gives you the required miter angle for multi-sided boxes. The Universal Angle Guide is furnished from durable aluminum and has a black anodized anti-glare coating that makes angle reading easy. Included are comprehensive, illustrated instructions.