Survival Hiking Boot Laces - Wilderness Survival Emergency Fire Starter - 550 Paracord Laces with Ferro Rod Tips and Serrated Steel Striker Tools - Black or Brown THE ORIGINAL FLINT LACES 2.0 - The tools to make a fire are ALWAYS with you START A FIRE - Steel serrated striker tools attach to paracord laces and double as tinder shaving survival knife 3000 DEGREES FAHRENHEIT - Ferro Rod produces a shower of HOT SPARKS capable of igniting a wide range of tinder in any climate NEW BUSHCRAFT DESIGN - Quick access flints secured firmly to metal base for improved grip function when you make a fire **THE DIAMETER OF THE TIPS ARE 4mm at the widest point. Measure your boot holes to make sure they will fit.