The Digi Angle combines the best of two measuring tools, a set of steel rulers and a digital protractor. The rulers are made from 4R stainless steel with 4 sets of increments etched into them, ranging from 1/8" to 1/64". The protractors allow you to precisely set angles in 0.05 degree increments with a strong front locking lever to hold the arm position while transferring measurements. The protractor has a measuring range from 0-360 degrees and features a hold function, ensuring you will never lose your reading and a reverse reading capability for those hard-to-calculate angles. Works great to set miter gauges, bandsaws, drill presses, miter saws, as well as setting door frames and wall angles for cutting crown molding and trim.