Two-headed drill/driver.
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Previously:
https://www.homemadetools.net/forum/...356#post236895
https://www.homemadetools.net/forum/...943#post232848
https://www.homemadetools.net/forum/...982#post226743
https://www.homemadetools.net/forum/...076#post236116
https://www.homemadetools.net/forum/...559#post209168