I agree with Michael about the Alien allen keys being awkward to use because of the shape of the handle, even when it is opened up. I use the folding type of tool from Lifa, just allen keys and a couple of sizes of phillips and common screwdrivers. That along with a chain tool and some sort of Leatherman clone, really just for the pliers should see you through most roadside repairs. Most bikes now only need allen keys for almost every adjustment. A small adjustable wrench will be necessary if you have any hex nuts on the bike. Of course flat repairs need to be addressed as well.