Gorilla-grip, made by Bondhus. I have 2 folding Bondhus tools, each with a different range of fold-out allen keys, plus a set of individual keys in a small plastic case. Not bicycle specific, so no torx key, chain breaker, etc, but high quality, correctly sized allen keys. The one I carry in my bike box has 7 keys from 2 to 8 mm. Avoid ball-head keys like the plague unless very high quality - they will round out your bolts or the head will snap off and get stuck in the bolt head. Bondhus also make torx keys. In an ideal world, all allen bolts on bikes should be replaced with torx bolts as the keys have more points on which to grip and work much better, particularly in smaller sizes. Try a tool store rather than a bike shop.
