I found this unusual tool in my fathers toolbox, and he had never seen it before. It is very interesting, to me, and I am wondering if anyone knows what this is.
It is roughly 8 inches long, and resembles an awl. Except that the shaft is jagged, and it has a screw tip. My first thought was that it is used to bore holes in leather, but I wanted to see what others had to say. Any information would be greatly appreciated.

See pictures at:
http://imgur.com/a/qFs1y