Power hammer. By Mr Novruz. 8:04 video:
https://www.youtube.com/watch?v=reo2XB_aRlI
Previously:
https://www.homemadetools.net/forum/...429#post169792
https://www.homemadetools.net/forum/...412#post169740
https://www.homemadetools.net/forum/...278#post169279
https://www.homemadetools.net/forum/...322#post165811
https://www.homemadetools.net/forum/...114#post157488
https://www.homemadetools.net/forum/...991#post156976
https://www.homemadetools.net/forum/...238#post154021
https://www.homemadetools.net/forum/...379#post150756
