http://www.cleverscampcamp.com/flashlight-key/
Is it safe to store a Swedish Firesteel (and front) on a keychain?
How likely is that to wake up when struck by an object metal key? My keychain has a Squirt Leatherman multi-tool, a Maglite Solitaire flashlight, and, of course, the keys (not a few of them).
It actually has a bit of pressure to generate a spark. Keep on your keychain in your pocket will be pretty safe.
Mini Flashlight Key Chains