Yes. Yes you will...scubamickey:You're gonna lose your key!!!! It's inevitable
I use my old dog tags and put a car key on there. It goes under the underwear on my dry suit and if the metal chain ever breaks it is real easy to find in the boot. Plus, if bad things happen and I am unconscious I have my name, ID# and blood group etched on there too. Should add a DAN tag on there as well while I am thinking about it...