High Carbon Steel Flint Striker. These Fire Lighters have dual purpose and can also act as a bearing block for Friction fire also and be used to strike a ferro rod if needs be. The high carbon content in the steel allows for plenty of sparks if used properly and with practice. In terms of use as a bearing block it works particularly well also, making the whole process alot smoother than using a wooden block. Great item and fun to use especially with char cloth.