925 Sterling Silver "Heart Shaped Lock with Dangling Key and Clear Crystals" Charm Bead 544 Quantity: 1 Bead Material: S925 Solid Sterling Silver (Stamped) Fits: Most major brand bracelets such as Pandora, Troll, Chamilia, Kay, Carlo Biagi, and other add-a-bead bracelets. Design & Color: Antique Finish Core: Screw On Core 4.4mm