Large Key and Heart Lock Keychain Set - You've Got The Key To My Heart; Couples Keychain Set Hand Made Item Keychains packaged on a card that says "You've got the key to my heart!" Metal: Zinc Alloy; Color: Silver tone with Black highlights. Size: The heart lock is about 1 1/2 inches long and a little over an inch wide, and the key is a little over 1 3/4 inches long and 3/4 of an inch wide. Net Weight: About 20 g.