Dividing head. By NOidea Machining.
22:38 video:
https://www.youtube.com/watch?v=IMB9ykcJgAs
32:44 video:
https://www.youtube.com/watch?v=jWwWDpb-cCc
44:23 video:
https://www.youtube.com/watch?v=Jqft1l5ImoM
39:47 video:
https://www.youtube.com/watch?v=BdmSvDJUY2k
