These really are much nicer in my view than the plastic version. Even though there are hundreds of sparks in the plastic....you just don't know when it is finished.
For a pocket kit though it is perfect for size and since it is not in constant use likely to be ready when you are.
I added a small ferro rod to my Ritter kit so to have my "normal" firetool.
I can see a real market for the metal Sparklites....enough of a market to make the manufacturer happy...well who knows, but they are certainly an improvement over the plastic version.