Ball bearing wrench. By Ananas Studio DIY. 4:52 video:
https://www.youtube.com/watch?v=1FwdbdFzaSc
Previously:
https://www.homemadetools.net/forum/...994#post164498
https://www.homemadetools.net/forum/...861#post163946
https://www.homemadetools.net/forum/...410#post161985
https://www.homemadetools.net/forum/...108#post157466
https://www.homemadetools.net/forum/...188#post145742
https://www.homemadetools.net/forum/...029#post145111
https://www.homemadetools.net/forum/...544#post132342