Early hog ring pliers, I guess. I just never saw a double ended one. No makers mark only marked Pat D April 21 1880. Two different size openings. Why no makers mark?

21->27

Datamp says made by Heesen Bros, Tecumseh,MI, it is the only thing listed for them tho...

http://www.datamp.org/patents/displayPatent.php?number=226915&typeCode=0

Boy, I don't know how you'd line up two hogs at the same time.

IF THEY RIP ONE OUT YOU HAVE  TO GO DEEPER AND TO THE SIDE WITH THE NEW ONE?    bob w.

If they rip one out, you better run, cause that's gona be one mean hog ;P

likely two different size rings that it works with - not all hog rings are the same

I need to get a pair of those since I do some upholstery now and again

The rings are also useful for fixing fencing net to the support wires....

You folks are all amateurs, I can line two hogs up in my sleep! What's wrong with you folks.... where's your skills?!!!!!!!!!!!!!!  I couldn't help myself.
It's late and I'm getting "punchy"
cheers,
bird.