Bnineteenteam Emergency Whistles Brass Survival Whistles EDC Tool for Life Saving Hiking Camping

Features: Made of overall high quality brass (with copper rings). Modern and fashionable design. Can protect whistle body, anti-scratch and anti-oxidation. Portable, it can be hung on the key ring. Can be used as a whistle or a bottle opener. The brass changes color due to oxidation processes, different color have different visual aesthetic. After oxidation you can use sandpaper or wipe with toothpaste, it can return to the original color. Suitable for outdoor survival, life-saving, EDC collections and other players. Specification: Material: brass Color: as picture shown Size: Approx. (length)6cm / 2.4in; (diameter)1cm / 0.4in Weight: Approx. 22g Package List: 1 x Whistle