I went to the local gun show this past weekend to look around, and Going Gear had a booth set up there. I'd seen the firesteel/ferro rods on their website along with a video showing how well they work, so I bought a few various smaller sized blanks to do some knot work on. They also had some nice wood handles for them, but I knew I wanted to try some knots, so I just bought the blanks.
I've seen several examples over the last few years with firesteels and flints being wrapped with paracord in round crown sinnets, like those sold by TAD Gear, and I even have one made like that, that a friend sent me a couple of years ago.
So far I've tied a snake knot grip with 2.4mm cord on the longer one I bought, and the next shorter one had close to 10 feet of paracord tied as a lanyard around it, and a smaller lanyard tied around one with 1.4mm cord, which would also make a good sized zipper pull firesteel.
I usually have a lighter or matches on or near me, but should those fail and a firestarting need arise, a firesteel is a good backup, and don't forget some tinder to help get that fire going.