Pro Jewelry .925 Sterling Silver "Set of 2 - Gear Design Compression Fit Lock Stopper with Rubber" Charm Bead for Snake Chain Charm Bracelets Quantity: 2 Beads Material: S925 Solid Silver w/ Silicone Slide on Core Fits: All major Brand Bracelets, such as Pandora, Troll, Chamilia, Kay, Carlo Biagi, Zable, and other add-a-bead bracelets. Silicone Inside beads will "grab" your bracelet and keep your beads from moving.