Review on SHAHE Electronic Protractor with Backlight: Accurate Inclinometer for Precise Angles by Travis Oetting

Product appears to come with 1 or 3 side magnets. I have the version with 1 magnet (bottom magnet); didn't know there was a 3 magnet version. I would buy the version with 3 magnets. The fit is accurate, but shows minimal deviations when adjusting the blade. Save a lot of set-up time by using tools.