Multi-beer bottle opener. When you tell your teenage son that he should do something with his life, like build a homemade tool.
https://s3-us-west-1.amazonaws.com/h...tle_opener.gif
Previously:
https://www.homemadetools.net/forum/...5062#post81114
https://www.homemadetools.net/forum/...3095#post98045
https://www.homemadetools.net/forum/...286#post101209
https://www.homemadetools.net/forum/...969#post102990