3 1/2" overall. Knurled silver aluminum casing with composite flint steel magnesium rod that is easy to use and provides tremendous fire starting power. O-ring sealed. Built-in super alloy striking blade can be used as a life saver if separated from knife or pack. Weighs only 1.6 oz. A must have for outdoorsmen, campers, hikers, hunters, kayakers, pilots and fishermen. Hang packaged. These fire starters are endorsed by The Navy Diver Challenge put on by the Navy Seals.