Bearing in mind that this was in response to an apparently newbie post, maybe someone should explain the acronyms:

MFS = Magnesium block with Flint Striker (I presume)

FIRESTEEL, I think, is a brand-name - you can do a search for it on the web. I personally haven't been all that impressed with them - I can start a fire more easily with the FeCe component of my Mag Flint Block that cost half as much, not to mention the BlastMatch. I personally have found the FIRESTEELs I've used to be overpriced and relatively ineffective. Am I doing something wrong?