What Is It? game 157

It's time for our giveaway collaboration with the always amusing What Is It? Blog! Can you guess what this is a picture of?

Place your guess in the comment section below. One guess per comment, please, though you can enter as many as you'd like. Post no URLs or weblinks, as doing so will forfeit your entry. Two winners: the first correct guess and the funniest (albeit ultimately wrong) guess will win T-shirt from the NeatoShop.

Please write your T-shirt selection alongside your guess. If you don't include a selection, you forfeit the prize, okay? May we suggest the Science T-Shirt, Funny T-Shirt and Artist-Designed T-Shirts?

For more clues, check out the What Is It? Blog. Good luck!

Update: Congratulations to commenter Just a guess who won for knowing these are for the ends of bulls horns -supposedly for decorations during a show, but common sense tells us they should be a safety feature as well. No one else came close by the time the What Is It? Blog announced the answer. Okkent wins for funniest guess when he said, "My wife requested this as her engagement bracelet. The attachment of my jewels was a condition of us getting married." Both win t-shirts from the NeatoShop!