As a Technical Services librarian, I'm constantly looking for a small screwdriver to open a computer case, a little wrench to loosen a laminator bolt, a knife to open a box... But I've been uncomfortable carrying a large multi-tool. I saw this on someone's list of "Tools Every Geek Should Own" and decided to try it. When I first got it, I was surprised at how small it is - but it really is useful! This little gem fits in a pocket very easily, clips to a belt loop, and has lots of useful things attached. My li'l guppy has everything I need, nothing I don't, and it makes a great keychain. Yes, it's a little heavier (like, grams heavier) than a standard keychain, but I don't even notice it. I've given away 4 so far as gifts to people who have totally geeked out on mine the moment they saw it - and that's not counting the several managers at my job who have bought them for themselves. Seriously - you can't go wrong with this tool. I can't recommend it highly enough.