I was willing to take off some paint to line up this square, but to my surprise when I ran the test it was perfectly square. I like the magnet idea because I don't have to worry about internal wear and tear with this tool. It's heavy and feels very well made. Excellent value for money and quality. The advert says there is a case that attaches to the belt, but I didn't have one. I don't really care because I'll probably hang it up anyway, but they should include the holder as they say they will.