What Is It? game 324

It's once again time for our collaboration with the wonderfully entertaining What Is It? Blog. Do you know what the pictured item is? Can you make up something totally wacky? That's what we're looking for: the funniest and most creative guesses. We will award t-shirts from the NeatoShop to two commenters who post the cleverest, funniest, or most outlandish use for this thing!

Place your guess in the comment section below. One guess per comment, please, though you can enter as many guesses as you'd like in separate comments. You have until Friday evening to come up with great guesses.

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

See, you don't have to know the answer to win! And there's another picture of this thing, as well as other mystery items, at the What Is It? Blog. Good luck!

Update: the item is a gunner's quadrant or artillery inclinometer. Interesting, but your wrong answers were downright funny! A t-shirt goes to pismonque, who said “That's the FreeFall thrill ride at Six Flags Over Lilliput.” Another t-shirt goes to Lucas Gentry for his answer “It's a practice bat'leth, for infant Klingons. Once you turn 5 years old, though, you need to use real blades, though.” Congratulations to both! Find the answers to all the mystery items of the week at the What Is It? blog.