I bought this at a thrift store the other day, not having a clue what it is! I guess that qualifies me as the consummate pack rat! Anyway, there is no identification whatsoever on this device. The plunger pushes down and the sharp point at the other end appears to punch or hole something beneath it. I don't think it would be a hole punch for paper because the sharp end which would make the hole is tapered like a knife point instead of being round. Leather punch? Something else? Please enlighten me if you know what this is so that I can add it to my ever mounting pile of neat things that I love but will never use! Thanks.