Jewellery Stand

What does this necklace stand for?

Not knowing is driving me crazy. Please explain. http://i183.photobucket.com/albums/x276/Miranii/what.jpg

Public Comments

1. It's those knuckle things...you put your fingers into the holes and punch somebody and they get real fucked up ...I think...
2. brass knuckles.
3. Brass knuckles, often used in the mafia when you beat someone up. illegal in most states. I'm not sure what the key is supposed to represent but otherwise a very EMO necklace.