I I've never seen a chuck like this, but if I had one setting it up to go on
my lathe would be really close to project number one. This is really cool.

Union chuck shown starting at about 0:45 seconds.

Don't care much abut the Cushman chuck he is actually planning to work with
later in the video.

https://youtu.be/nJKW8bgCv5s?t=45