Despite all the junk I bought them to fix my saws. They can work for this, but the squares appear to be 1/2-1 1/2 degrees out of square. The body is easy to store, and they are packed in oil to prevent surface rusting during transportation. If you want real precision, you should avoid this. For my purposes, they can get the job done, but they won't know for sure until I start using them.
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