This product is a set of 2 lightweight aluminum survival metal whistles, perfect for outdoor activities such as camping and hiking. The whistles are durable and made of aluminum and stainless steel, with a length of 2.61 inches. They are suitable for use as a safety whistle on a keychain or backpack, providing a convenient means of self-defense in emergency situations. The multicolor design adds a stylish touch to these practical and essential outdoor gear items.