UST StarFlash Multi-Tool Signal Mirror, 4.6 x 3-Inch Multi-function, ultralight signal mirror with built-in precision aiming system; ideal for any survival kit Survival tool essentials include flint fire starter bar, ruler (inches and cm), lanyard with whistle, and liquid-filled compass Virtually unbreakable mirror works in overcast conditions Measures 4.6 x 3 x 0.25 inches (117 x 76 x 6mm); weighs 3.2 ounces (91 grams) Backed by a manufacturer's limited lifetime warranty