Got this as part of a larger reloading deal, and never seen one before. The lever & knob makes me think it's a "hand" tool, and the offset pivot (and some light wear marks) suggest that it pushes on whatever gets clamped into the other end, but what? Any insights appreciated.
Pic:
The inside diameter of the clamping end is .895", and there's room w/ the split to close it up another .020" or so.
Thanks for looking!