What Is It? game 175

It's time for our collaboration with the always amusing What Is It? Blog. Can you guess what the pictured item is? Great guesses win prizes!

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 photos of this object, check out the What Is It? Blog. Good luck!

Update: It took a while, but Edward K had the right answer. This is a pet ID holder. You can slip paper inside it and attach it to a dog's collar. The funniest answer came from Randall, who called it "A hummelfubertapfer. Scandenavian beer drinker would use this timy hammer to break of the ice that formed on their beer as they drank it. This led to the colloquial joke of 'Is that your wife's nose or a Hummelfubertapfer?' after which the the joke's subject would either fly into a rage or laugh uproarously, depending on their level of inebriation." Both win t-shirts from the NeatoShop!