They are really good and much better than using my knife spine or the ones that usually come with them. They are dead small with nice handles so you can use the last cm of the firesteel much easier and with far more control.
I switched to them after I recently stopped carrying my firesteel on my knife sheath. It was a pain unsheathing my knife everytime when the rod was no longer on the sheath so I went with these. You can get bright, long burning sparks off the rod by only scraping the last 5mm of it. Lights anything first strike, even candles and denser feathersticks. I highly recommend them to anyone who likes to use the very end of their ferro rods for lighting.
I switched to them after I recently stopped carrying my firesteel on my knife sheath. It was a pain unsheathing my knife everytime when the rod was no longer on the sheath so I went with these. You can get bright, long burning sparks off the rod by only scraping the last 5mm of it. Lights anything first strike, even candles and denser feathersticks. I highly recommend them to anyone who likes to use the very end of their ferro rods for lighting.