just a guess.... gem stone cutters set the stones in hard wax to hold them for grinding the facets and polishing....could be a handle for that trade
Joe
When cutting cabs you usually use a wood dowel. There is a commercial dop stick, but it is aluminum, with a flared end. None have handles, but they would be nice often.
Small metal dops are used for faceting stones. Commonly, they have ends that are flat, conically cut in from the end, and "V" shaped notches in the end. Other end configurations are less common. A handle would get in the way when mounting the dop to the grinding jig.
I've cut lots of cabs, but I haven't cut any faceted stones. I have 3 or 4 cabbing grinders.
Chilly