I have a SAK Explorer model with a nylon sheat but I find I already tend to leave it at home. It has the magnifying glass, useful for reading small prints but forget making fire with that. Anyway later on I discovered fresnel lens. On my keychain I have Sliver Gripper tweezers, a teeny-weeny pair of folding scissors (not the Slip-N-Snip ones) that I got from the Canadian version of the Adventure Medical Pocket Medic, a Photon II red LED light and a mini Fox40 whistle hanged on a Lucky Line Secure-A-Key clip-on. It's starting to weigh a little bit but I wear sturdy leather belts. Sometimes I remove the obnoxious blaze orange whistle but before I got the Secure-A-Key clip-on, it once helped me find my lost keychain.

I will probably go with the Spyderco Delica plain edge that I will clip inside my waistband like on Doug's picture.

Frankie