Finding a wall corner or corner to attach a baseboard or crown is crucial for seamless connections. This angle finder is easy to use and has digital precision for precise cuts. I used this to cut out and shape our Craftsman base and it helped a lot! All angles were +/- 3 degrees from 90 and without this tool I would have made a few notches per corner. A word of caution, calibrate the instrument before use. It's a two-step process, but worth it for the sawdust reduction! Bye Danbo.