Use this Wixey digital protractor electronic angle gauge to get quick, accurate measurements of existing angles like mitered trim work, crown molding, roof slopes, and wall corners. This tool is particularly handy when measuring the true angle of inside and outside wall corners for tight fitting crown or base molding and chair rail miter joints. Large easy to read display reads angles from 0 to 180 degrees, and can be zeroed at any point in the swing of the protractors leg. Whether you are measuring an odd, hard to reach angle or setting up your table saw blade, just read the angle measurement directly from the digital protractor. Each 9" long x 2" wide aluminum leg has built in magnets to help hold the protractor to metal surfaces.