Electrical panel hole cutting tool.
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Previously:
https://www.homemadetools.net/forum/...890#post137377
https://www.homemadetools.net/forum/...789#post163710
https://www.homemadetools.net/forum/...430#post154706
https://www.homemadetools.net/forum/...357#post150637
https://www.homemadetools.net/forum/...370#post154517