Prep for anything.
We're not going to say you'd never find yourself in a situation that Park Tool's MTB-3.2 Premium Rescue Tool couldn't get you out of, but we will say that you'd have to try pretty hard to get there. As its name suggests, the Premium Rescue Tool was designed to get you off the side of the trail or road and back onto your bike when you're dealing with maintenance problems beyond the capabilities of a typical multi-tool and tire patch kit.
Park Tool includes an assortment of tools smooshed into a tiny, compact design that won't leave you feeling like you're weighed down with disaster gear before every ride. The set is finished with features like a protective cover that splits apart to act as two tire levers and a three-piece construction that locks together to become one easy-to-store tool when not in use.