The sparks are thrown from firesteels by the shaving off of tiny little bits of the substance. The energy of shaving them off heats them up enough to ignite, making them burn. Anything with a sharp enough, hard enough edge should throw a spark. If you're having trouble with the Becker, it's possibly because the section you are using is not sharp enough, or you could be holding it at a funny angle. What I did was to break off about 3"-4" of an old hacksaw blade, and wrapped the first couple of inches in a few layers of masking tape. The masking tape makes a handle, and the BACK edge of the blade is plenty "sharp" enough to throw sparks. If needed, you can use the tooth edge of the blade to throw a LOT of sparks, or to saw on the magnesium block to quickly get shavings. I attached it to the block with a short length of ball chain.