It's not every tool you might need for a roadside repair, but if this is your wallet, you'll be glad to have it if you're ever out in the wild without your saddlebag.
In one metal slab, it's a 15mm axle wrench, two screwdrivers, multiple hex wrenches, and a spoke wrench. Great for on-the-fly adjustments. If you're ever stranded somewhere and don't have the tool or part you need to get rolling again, well, there's always the bottle opener.
Timbuk2 Bicycle Seat Pack