Pack of 6 Small Ferro Rod Survival Drilled Flint Fire Starter with Toggle Hole for Paracord Bracelet Necklace Diameter: Diameter: 5/16inch(8mm) Length: 1 inch Material: Ferrocerium Diameter of the hole: 4mm Length of the Ferrocerium rod: 1 inch(2.5cm) Diameter of the Ferrocerium rod: 5/16inch(0.8cm) Diameter of the hole: 4mm Fasten this fire starter toggle to your gear, clothing, shoelace, keychains, custom paracord creations. This toggle ferrocerium rod not only cinch up your gear, they produce fire - whenever and wherever you need it.