Yay! It's time for this week's collaboration with the always awesome What is it? blog. Can you guess what this um, rather violent-looking tool is used for? Hint: it has a very specific use - and it's not for braining someone!
Place your guess in the comment section. Please post no URL or web links - let others play! 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 6/18/09 - The answer is: A trucker's tire checker, tires are struck with this tool and from the sound and feel they can tell if the tires are properly inflated. Congrats to Bill Wixon who got it right first!