100% food grade stainless steel, safe, durable and sturdy, much better than plastic. Each whistle comes with a lanyard, you can hang it around your neck or hang it on a wall hanger to free your hands. The fitted whistle fits comfortably in your hand and is easy to grip. Thus, even with prolonged use, there is no cramping and tension in the fingers or hand. Suitable for both right-handed and left-handed people. The sound is loud and crisp, you can quickly grab attention whenever you want. Each whistle comes with a black lanyard, you can simply hang it around your neck or on a wall hanger to free your hands. Our stainless steel pipe is rust-proof and waterproof. This guarantees the longevity of the pipe. At the same time, the production is ensured that there are no sharp edges. It is thus a successful instrument tool for professionals, whether indoors or outdoors. Wide applications: suitable for referees, coaches, teachers, sports , rescue swimmers, teachers, self defense, survival, emergencies, cooks, bird or dog training etc.