compact keychain ferro rods fire starter. Lightweight and durable: It is composed of lightweight aircraft aluminum body and replaceable threaded 1/4 x 2" Ferrocerium rod. Ultra-portable for key ring, pocket and neck carry. Product dimensions: 3.6 x 0.4 x 0.4 inches, its weight is 0.7ounce Use a protruding connection design to make the exposed part longer and easier to ignite The arc-shaped sawteeth and elongated blade is more prone to sparks Great survival tool: Great for Bush-craft, Hiking, Camping, Hunting, Fishing, EDC, Emergency, BBQ, etc