*coughcough*
I know phinz didn't tell yet I'm right, but I know, I have seen that skyline a few times in my life, so I feel free to post the next picture.
I know what it is, but I don't know, if I can describe... I had one myself when I still had my horse...
it's a knife to cut out hooves and it is used by brave and strong horseowners and blacksmiths..
I just used it if something at the rim of the hoof splitted..