http://www.epc-wheelchairs.co.uk/products/251/gorilla-grip-tool-metric-allen-key-set.htm
Iv had this allen/hex key set for 3 years now and used it on everything from my bike,sprinter van to flat pack furiture.
lets face it the allen keys that come with flat pack are as bad as the ones under the seat of your bike… 
Anyway its the best set iv have ever used, i have a more expensive and larger “named” set but i always find myself reaching for this when ever i see and allen bolt.
All the keys fold away nicely into the handle which then fits perfectly into your hand giving you a lot more leverage than you would have with a normal set of keys.
You can also rotate the handle around the key your using making it work a bit like a ratchet.
Its made of tuff plastic and is more or less indestructible, trust me iv used it to remove allen bolts on the engine of my van and unless your thing is ship building theres keys to fit most applications.
The other thing is a rubber hammer now i know that may sound like somthing a clown might have but trust me its a very usefull bit of kit.
If you do a bit on your bike or car you will know that in mechanics parts often needs some errrmm… “persuasion”
It may be a wheel spindle that needs a lil tap to see it in or out or the top yoke.
A rubber hammer sofens the blow 
it wont bur or bent anything.
This one has two ends one is harder than the other and the heads are replaceable.
