What is it? Game 102

This week’s collaboration with the always fun What is it? Blog brings us this strange tool. Can you guess what it is for? Hint: it has a very specific use, and it’s not what you’re thinking about.
Place your guess in the comment section. No prize this week, so you’re playing for fame and glory. Please post no URL, so others can play.
Be sure t check out the What is it? Blog for more hints. Good luck!
Update 6/26/09 – the answer is: A life raft bullet hole plug, it was part of a kit for a life raft that was carried on an airplane or large ship.
Congratulations to Chris P. who got it right first!

















