Show the members of your club or organization that they're up to the task when you make a presentation of these Challenge Coins. These coins originated during World War I, and were issued to soldiers as a symbol of camaraderie and unity. This modern take is 1.5" and made of quality nickel-plated zinc alloy with a die-struck imprint and a soft enamel color fill. Customize each one with an organizational or company logo or message. They're the perfect token to give to commemorate membership, years of service, or to acknowledge special honors.