Sunshine Serafina Black Metal Black 1 Inches Key Ring Chain Keychain Split Ring( Pack of 50) This is black key ring. Size: Approx. outer diameter 25mm (1 inch) Great for connecting clasps, charms, links and other jewelry Great for connecting clasps, charms, links & more 100% NONTOXIC Unlike other key rings, Prudance rings are lead free! Don't take chances with others! Material: Nickel plated steel