It's hard to find as many survival features in an item as one would in the Flint. The Flint packs enough survival and defensive components to get you through the night or away from danger. In a tool the size of a pencil the Flint has a built-in fire starter steel wool tinder compartment carbide-tipped glass breaker and safety whistle. Weighing in at less than an ounce and measuring 4.3-inches long it's small enough to be carried on a lanyard in a pocket or in a pack. Wherever the destination is it's always nice to have a backup plan.Tools: Fire Starter Steel Wool Tinder Compartment Carbide-Tipped Glass Breaker Safety Whistle