Part of some sort of grinding or sharpening jig. I don't have any of the other parts, just this that I got in a box of assorted scrap metal. Everything else I know about it is here:
https://www.google.com/patents/US3145512
Free if anyone wants it. Pick up or cover shipping cost and this wonderful thing is yours.


https://www.google.com/patents/US3145512
Free if anyone wants it. Pick up or cover shipping cost and this wonderful thing is yours.



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