What is this tool thread? Take a guess. Stump the Toolman!

I was over at friends house last night and he pulls this tool out. He has no idea what it is, but would like to know. It has four sizes of cones that will slide over the end of the adjustable side, and if you notice it has a hole in the right side so you can either drill or ream something that fit in this jig. We would really like to find out what it is.

Thanks,
Tom