Lot of(two) big ferro rods, 4 inches long*(100mm) and 3/8 inch diameter. Big ferrocerium rod/flintsteel/firesteel. Excellent gift for anyone that likes the outdoors. Solid ferro rod. Feels good in your hands when you're striking it. Throws big sparks. Depending on what kind of striker you use. The diameter is 1/8" short of a 1/2 inch *The length is 1/16" short of 4 inches