If you've ever done any kind of wrenching on your bike (any vehicle), you've probably lost a socket. You've probably lost the 10mm socket more than once and there are probably a few still missing from your tool drawer.
With this key fob, you will never be without a 10mm socket ever again. If you're ever in dire need of a 10mm socket, just remove the fob from the key ring and slide the socket off of the fob. There will even be two M6 nuts inside just in case.
Don't forget to put it back on the fob when you've finished saving the day.