Saw a posting on this a while back, anyone familiar with this punch, have one to provide a pic, as I recall it is a triangular shaped point punch that can be used to tighten loose roller tables.

Yes there is such a punch of which I happen to have two and it is listed in the KD & Marshall books. It is basically a last resort tool being able to cause a lot of damage, quickly if used wrong. It's called a star punch.

Book