Hand-powered pump drill.
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Previously:
https://www.homemadetools.net/forum/...864#post156397
https://www.homemadetools.net/forum/...885#post144494
https://www.homemadetools.net/forum/...906#post140565
https://www.homemadetools.net/forum/...820#post133397
https://www.homemadetools.net/forum/...023#post125421
https://www.homemadetools.net/forum/...035#post112231
