Review on Saker Miter Saw Protractor, 7-Inch Aluminum Protractor Angle Finder with Precision Laser, Inside & Outside Miter Angle Finder - Ideal for Carpenters, Plumbers, and Tradespeople (Black) by Tony Suggs

I'm using a simple corner tool used to copy corners. It has no ability to measure, but easily copies angles. This tool is more advanced and gives you actual measurements in degrees of angle that you can use to set up your miter saw. If you need to know the actual measured angle, this tool can come in handy.