Screwdriver. By Mirock's Toolworks. 10:41 video:
https://www.youtube.com/watch?v=glMKs7pU-z8
Previously:
https://www.homemadetools.net/forum/...379#post173346
https://www.homemadetools.net/forum/...599#post170413
https://www.homemadetools.net/forum/...133#post184414
