The Topeak Alien II multi-tool is pretty incredible. It's an entire tool box that fits comfortably into your hydration pack or jersey pocket. There are 26 tools in all, and short of a cracked frame or complete fork overhaul, you should be able to fix just about anything with the Alien II. The Topeak Alien II combines pressed stainless steel with engineering-grade plastic for lightweight durability. It also splits apart for ease of use. The Alien II comes with a chain tool and a chain hook to assist with chain repairs. It also comes with a 15mm pedal wrench and two tire levers. As for Allen bits, this Alien has them covered from 2 to 10mm, with a T25 Torx also included. 8, 9, and 10mm box-end wrenches, along with 14, and 15-gauge spoke wrenches, and #2 Phillips/flat-head screwdrivers, round out the Alien II's features.
