Rotary shear. By TheDacchio. 14:52 video:
https://www.youtube.com/watch?v=ZwsGFzVxTtA
Previously:
https://www.homemadetools.net/forum/...505#post177822
https://www.homemadetools.net/forum/...121#post176369
https://www.homemadetools.net/forum/...445#post173642
https://www.homemadetools.net/forum/...227#post172720
https://www.homemadetools.net/forum/...016#post171914
https://www.homemadetools.net/forum/...815#post171162
https://www.homemadetools.net/forum/...971#post168056
https://www.homemadetools.net/forum/...885#post167749
https://www.homemadetools.net/forum/...642#post167017
https://www.homemadetools.net/forum/...200#post165397
https://www.homemadetools.net/forum/...217#post165440