1937 jar lid opening tool.
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Previously:
https://www.homemadetools.net/forum/...700#post147868
https://www.homemadetools.net/forum/...307#post138801
https://www.homemadetools.net/forum/...515#post139353
https://www.homemadetools.net/forum/...825#post105524
https://www.homemadetools.net/forum/...951#post119905