Copper Key and Lock Keychain Set - You've Got the Key to My Heart; 7 Year Anniversary Gift, Couples Keychain Set Hand Made Item - traditional 7 year anniversary gift Keychains packaged on a card that says "You've got the key to my heart!" Metal: Zinc Alloy; Color: Antique Copper Tone with Black highlights. Size: lock about 1 inch long key is about an inch and 3/4 Net Weight: About 20 g.