What Is It? Game 105

This week's collaboration with the What is it? Blog brings us this strange tool above - can you guess what it is for? Place your guess in the comment section. No prize this week, so you're playing for fame and glory.

For more clues, check out the What is it? Blog. Good luck!

Update 7/19/09 - the answer is: A transmission spring compressor and holder for Model T Fords, according to a patent for a similar tool: ...for compressing and holding transmission band springs, which band springs are carried by bolts disposed in a removable section of a transmission casing. From patent number 1,433,944. Nobody got it this time around ...

Hmm... I would guess that it's used to move something very hot, but it doesn't have any kind of lip at the end that would really give it a more secure grip.
I have no idea what it is lol.
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It is a mouse sexer. Despite the rough look of this object, it is in fact a precision scientific instrument. Unsexed immature mice are sorted by passing through the adjustable gates at the base. THese gates are slightly offset, and by spreading the gates mice of various age can pass through them. Fully closing the gates allows only male mice to pass, as they have narrower hips than females. opening the gates slightly allows for immature female mice to pass and opening the gates completely allows for mature females to pass. In the 1930's, when this device saw widespread use in behavioral labs, the phrase 'open door policy' drew snickers even from aged professors.
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