Bearing Ball with Flat for Vise work...?

[C-Bag]

Great ideas here. So many thinkers and problem solvers.
AND, no stupid jokes and insults.
Anyway, I need some ways to hold/clamp small fasteners.
Sometimes I have to repair or cut & clean small bolts. How are people here holding bolts in general and
on the mill or lathe? Photos welcome. Thanks

I stole the basic idea of this from Marv Klotz called a lantern vise. His didn’t have the v slot and the little bolt in the v for grabbing small thin bolts. He also used wing nuts where I just use allen heads. Lays flat on my bandsaw and does the job for me as in my messing with 80/20 extrusions I’m always needing custom length small bolts.