Multi-purpose pocket tools, are the Swiss Army knives of motorcycle tools, and in most cases have just about everything you need to affect some sort of repair, even if it's a bodge. In my opinion the best motorcycle specific multitool on the market is the CruzTOOLS Outbacker. I've been using one for years and these things are hard to beat. Available in both metric and SAE sizes the Outbacker incorporates four Allen keys, a 1/4 inch driver, three sockets two wrenches, and three spoke wrenches, along with a standard and Phillips head screwdriver. The whole shebang folds up into a 3 1/2 X 1 5/8 package that weighs about 9 ounces. If you're really pressed for space it'll even fit comfortably in the pocket of your jeans, especially, if like me you prefer the "comfort cut" variety. As with any wrench if it's a nut and bolt you're trying to tighten, you'll still need something to hold the other end, but that aside the Outbacker has everything you'll need to get you out of the woods. Overall this is a really handy tool to carry, and the first one I grab when I'm grabbing just one.