So I bought a small box of tap wrenches, and it had a dollar general dial caliper in it, as well as this. The guy had no idea what idea it is, and neither do i, he seemed to think it had to do something with machining
The "roller has 2 textures and 3 different sized wheels that thread on.
I would call it an offset round rasp. Probably belonged to a pattern maker or a fine woodworker. Can’t find an exact match, might be a Heller rasp.