Used to sports events, ask for help, Training pet. Reliable Quality: Top stainless steel material and great electroplate technique resist rust, corrosion, discoloration, and insure long-time color retention. Wide Application: Portable size comes in packs at your choice. Ideal for , referees, officials, teachers, , women self defense, lifeguards, or emergency whistle to get one's attention. Family Whistle: This whistle pack includes 1 metal of varying sizes and 1 matching straps. They're a great size for adults and kids. Loud Crisp Sound: Traditional "6" molded shape and precision welding will make high pitch with enough air for the whistling mechanism.