Wide range of use Emergency tools aluminum safety whistle for a variety of occasions, such as: camping, hiking, hunting, fishing, boating and any kind of outdoor activitiecs coaching whistles, safety whistles, can also be used for dog training. Quality materialThese security emergency whistles made of aluminum materials with keychains, relying on quality and safety, security emergency whistles are not easy to break, fade or corrode, aluminum whistles waterproof, rust-proof, can be used for a long time Sound loud enough Our aluminum outdoor survival emergency safety whistle is blown loudly, with a large sound that travels a long distance and can be heard from a long distance Easy to use and carry Small and sturdy in size, these emergency safety whistles are 4.5cm long x 0.8cm in diameter can be hung on a keychain as a decoration, easy to use and the right size for your use and carry Beautiful gift You will get 6piece aluminum whistles blackit can be a nice gift for your friends who want to travel outdoors, hiking, camping, or who need help in emergency, really a nice gift