Spanner for fixed

If you are running track nuts on your fixed - what kind/brand of spanner do people usually carry in case of a flat? i.e. I don't want to carry around a massive adjustable in my back pocket.
I'm awaiting delivery of my first fixed and hadn't thought about this before......
I'm awaiting delivery of my first fixed and hadn't thought about this before......
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A bit big for a wedge type bag but I just stick it in my jersey, nice and light
It's marked '150mm HEAVY DUTY' on one side and '6" DROP FORGED' on the other.
Not particularly light but it's almost nothing in comparison to me.
If I had a baby elephant signature, I\'d use that.
Advice for kilted riders: top-tubes are cold.