How do you use the C-3053 burnishing tool?

The upper 1.500" smooth part of the shaft is .483". The rings are .487. The minor OD (grooves) of the rings are .433. The entire shank under the step is right at 1.800". The finish is very smooth. The rings have a fairly sharp edge. It's been awhile since I've used it. I called them "cutters" but I don't think they actually removed any material. Just swedged the bushing in the bore as someone else stated and burnished the bore.

burnish - verb 1. polish (something, especially metal) by rubbing.

swedge - verb 1. To shape metal using a hammer or other force.