Vintage Unbranded Balance Screw Holder/Pin Vise/Setting Tool

Description

Vintage Unbranded Balance Screw Holder/Pin Vise. This style has screws on both ends. I have been told this tool is several different things, so I tried to mention them all. If you need more photos, just ask. I'm not an expert and you know more about the item than I do.
Condition is used, and there is some pitting and grime, but the overall condition is good.