What is this?

…next to a tail stripper

Kind of resembles a bullet mold.

its a clamp to hold tubing while you use a flaring tool

x2

It looks a bit like that , I have a couple of them. But , there is a bit missing. Both ends of the flaring/double flaring tool are made to be closed/clamped together. And you need the horseshoe shaped piece with the flaring cone.


Horseshoe piece with cone not pictured.

If it is a flaring tool , the holes will have a bit of thread in them to grip the tubing tightly.

Thanks! Mine is made of wood

I doubt it is a flaring tool then. Made many a custom brake/fuel line with mine. Lots of pressure is exerted to bend/flare the metal tubing. Wood would not work.

Bullet puller?

I have something similar

Remove the die from the press, put loaded round in shell holder, bring up, clamp onto bullet and pull back down. "Clamp" catches on top of press and bullet comes out super easy

Brakeline fitting tool

Clearly it's a pig casatator

Clearly

Not a flaring tool. No camphor on it to for the flare.

Tail stripper

Yep Pig Castrater for dwarf pigs