bayite Survival Drilled Ferrocerium Ferro Rod Flint Fire Starter Rods with Keychain Ring 3.14 Inch Pack of 3 Ferrocerium Rod Length:3.14"(8cm), Diameter: 5/16"(8mm) We drilled a 4mm Hole in the rod. And the rod comes with a Stainless Steel Wire Keychain. You can use it to keep product secure and together START FIRE ANYWHERE: Works in any conditions - rain, snow, high-altitude, ultra-durable. Made of rust-free ultra-strong ferrocerium rod. Provides up to 3000 degrees C spark in any weather, at any altitude Striker lights up small piles of dry grass, paper, Hemp, and other flammables. Perfect for Bushcraft, Hiking, Hunting, Fishing, Camping, EDC, Emergency, BBQ, Gas Camp Stoves, etc If you don't have good scraper to get enough sparks, we suggest that you use the back of a blade from an box cutter. That's the most efficient scraper that can be found easily 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.