It is a round magnesium bar with flint attached right? Very common style fire starter. I personally carry one in my waist bag sized kit, also I believe Doug carries a version of it. It does work very well, though most here don't like using the mag as a tinder. It tends to blow away, burns too fast, and requires a bit of work to get a good pile of shavings. The flint bar on the other hand is great, they throw a good shower of sparks and it is a thick bar with a good backing (I know a problem with cheaper ones was the bar would fall off of some of them, though I haven't had that problem personally) I think it is a great keychain/pocket starter. It is a bit bigger and more expensive then the BSA hot spark, but it does give the mag bar which means if tinder is hard to come by you are atleast carrying something. One thing to think about though, it is a two hand fire starter, it is a good idea to carry a seperate method that can be used one handed. Carrying a magnifying/fresnel lense in your wallet and a Spark-Lite in your "altoids tin sized kit" means you have good backups that take up little room, even a Bic can be used as a one handed fire starter after the fuel has run out if you remove the metal shield piece on top. <img src="images/graemlins/cool.gif" alt="" />