Well I'm new to all this, but my keyring has on it. Victorinox MiniChamp II Leatherman PS4 Peanut Lighter Fenix E05 flashlight At the moment it also has a small sharpening stone in plastic case that I'm assured is military issue, and a Storm emergency whistle. It is actually a few rings, keys on one, tools on another, held together with some spring clips I found on eBay. I might have to make some revisions, it is quite bulky. I've a Fox 40 Classic on order. It's not as loud as the Storm, but it does take up less space. I also have a Gerber Shard on order to give me some small prying ability. I do take the tools off the key ring when I'm in the car. I don't want to wear the ignition tumblers out prematurely.