Ultimate Survival Technologies UST Micro Sparkwheel Ultra-lightweight, reliable fire starter generates sparks in any weather conditions; easy one-handed use Made of high-quality brass; designed to spark hundreds of times Includes compact, waterproof storage tube with 3 replacement flints Ideal for camping, ultralight backpacking, hunting, emergency preparedness, and more Measures 1.5 x 0.4 x 0.3 inches (38 x 11 x 8 mm); weighs 0.4 ounces (10 grams)