Has no one mentioned the Campagnolo 8mm box spanner 6mm allen key combination T tool?
Mine is wrapped in a plastic bag along with puncture kit, spanners, allen keys, tyre levers, inner tube etc, and strapped under my saddle
On my commute it fell off from my bike and I only noticed it when I arrived, so in a panic I went back 6 miles to try to find it. Luckily I knew exactly where it dropped because someone in a car overtaking me was making gestures at me, I didn't realised they were trying to tell me something had fallen from my bike. When I got there, at least one car had ran over it, the glue from the puncture kit had splattered everywhere but all the metal tools survived, the T tool had some scratches but I was relieved I got it back!
