bayite 4 Inch Survival Ferrocerium Drilled Flint Fire Starter Ferro Rod Kit with Paracord Landyard Handle and Striker 9ft Paracord included, gives you a good grip and never comes off. Comes with a striker attached to the paracord, always be prepared to start a fire Ferrocerium Rod Length:4"(10cm). Diameter: 3/8"(10mm). Large enough for a shower of sparks and small enough to carry Don't use bad quality Knife as striker. Otherwise it will not produce enough sparks due to insufficient hardness of blade Made of high effective ferrocerium rod. Waterproof & Weatherproof, fits all weather, works in any weather condition Sparks shower at 5,500 F (3,000 C) to ignite a fire in any weather (even wet), at any altitude. Perfect emergency fire starter for Bushcraft, Hiking, Hunting, Fishing, EDC, Emergency, BBQ, Gas Camp Stoves, etc Can be used for the kitchen as well as survival. Not only for emergency bug-out bags, but also for gifts. Large size( 1/2&#039;&#039; thick) means plenty for your hands to hang onto. If you have large hands, we recommend the large size. The 3/8&#039;&#039;  4&#039;&#039; is big enough for easier strikes and small enough to carry. Scrape away the coating to expose shiny metal before first use. Hold the ferro rod close to the tinder at about a 45-degree angle. Place the scraper near the top of the rod. Pull the rod back (away from the tinder) with a slow and steady motion.