Lathe chisel. By 1004Yoo. 5:36 video:
https://www.youtube.com/watch?v=uCH6N6lDrrI
Previously:
https://www.homemadetools.net/forum/...377#post173344
https://www.homemadetools.net/forum/...627#post170491
https://www.homemadetools.net/forum/...409#post169737
https://www.homemadetools.net/forum/...882#post167746
