I was looking to add a small fire steel to one of my smaller survival kits and increase its versatility, that is how I happened to find the Woodsmaster Mini Kit Sparker on the survival.com website of the late Ron Hood.
It’s a ferrocerium rod 2 inches long with a diameter of 1/8 of an inch, simply scrape with any sharp object such as a knife or a shard of glass to produce a shower of sparks. I have added mine to a survival kit I built using the small tin included with the RSK Mk5 survival knife, it is a welcome addition to the flint striker wheel from an old clipper lighter. Thus doubling my options of making fire should I find myself in a survival situation.
They cost $3.50 each approx £2.20 or you can buy 5 for $15 with a small saving, you can order them here.