I know I have lost a bunch of 10mm sockets. If you add one of these MR2 Key Chain 10mm flex-head ratcheting wrenches to your key chain, you will be less likely to lose it. These are available in chrome finish or a burnt titanium finish (no, the wrench is not titanium.... it is a electroplate which looks like burnt titanium). Additionally, they are precision laser etched with an MR2 because who doesn't love the MR2.