Drilled firesteel/ Ferrocerium rod with super alloy carbide steel ferro rod striker. 4 inch long and 3/8 inch diameter ferrocerium rod. 5 mm drilled hole to easily thread you own paracord The super alloy carbide steel striker has six 90 degree edges. Excellent for everyday carry, EDC. Ferrocerium rod throws sparks around 3,000 degrees fahrenheit.