This is a mount for dial indicators with the standard dovetail (roughly 1/4" wide, 45 degrees,) to use in a drill press with a 1/2" or 13mm chuck to center round parts accurately. It has three vertical dovetails to hold the indicator at different offsets, and one horizontal, to accommodate a range of different sized parts. It uses printed-in spring tabs to retain the indicator in the vertical dovetails.
Take care to avoid placing seams inside the dovetails or on the flats of the shank (the attached 3mf file has this done already.
The author marked this model as their own original creation.