Poor quality control. I considered making my own sample square but gave up because I didn't want to play around to make sure it was square. So after $10 I have a non-standard approximate square that I need a file to fix. I like its looks and it seems solid. So if it was square I would probably give it 4 or 5 stars. But the only thing I need can't do it until I fix it. I thought I was buying a tool, not a project. I'm used to tuning instruments. Planes, chisels, etc., you expect an installation with them, not an angle.
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