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Good joinery: not to loose but not so tight I have to beat it to a pulp!
Credit to https://t.co/YPzqETpSfz
Power tapping with a 3/8”-16 spiral fluted tap.
Credit to https://t.co/HbWNZr6GEH
High efficiency large-diameter head drill
Courtesy of @OSGCorporation
The world’s first 3D printed car.
Credit to @Frederick_spark