Steel Disc Keychain Layered With 2015 Penny With Engraved Heart Around Year and"Lucky Us" Engraved Steel Disc Perfect for couples 4 year anniversary gift (4 years gift, 4th year gift), or for a best friend gift The US one cent coin is called a penny and is a symbol of luck. Packaged on a card with saying "What a Lucky Year!" The copper coin is a USA one cent penny 20 mm diameter and the steel disc is 30 mm diameter. Handmade item, engraved, made in USA, net weight: about 10g.