Crank Brothers Multi 17 Tool is awesome!
A great tool that is well worth it's weight. Despite the heft of this tool it is actually compact in size for all the tools that it packs in. Chain breaker, Torx T-25, 8-mil for the cranks, spoke wrenches, 8, 9 and 10 mm wrenches. It really does have virtually everything you will need short of a pump and patch kit or cold beer.