Punch tool. 18:15 video:
https://www.youtube.com/watch?v=OpVZBg43Q7s
Previously:
https://www.homemadetools.net/forum/...913#post137451
https://www.homemadetools.net/forum/...890#post137377
https://www.homemadetools.net/forum/...616#post136355
https://www.homemadetools.net/forum/...297#post106902
https://www.homemadetools.net/forum/...801#post105436
