Lathe tailstock. By INNOVATION TIME. 16:55 video:
https://www.youtube.com/watch?v=7qzVUeAWQQw
Related:
38 sets of plans for homemade tailstock modifications and accessories
Tailstock Depth Indicator by Christophe Mineau
Tailstock Die Holder by mr95gst
Tailstock Taper Turning Attachment by rossbotics
