Just been looking at my keyring and thought about what I carry on it. I have a maglite solitaire and a p-38 tin opener on one of my keyrings (I would have a small sak as well, but I've managed to mislay both of them in my room!), and I want to get a squirt p4 for it as well. My sak is almost a key in its own right, it is so good at opening things, the model is a climber and I have an led light and a water proof capsule with some matches in it. They arent that exciting, and others must have better tools on theirs. So, what do you have on your keys? Or as an emergency bundle?