The clever design of this expandable bangle bracelet features a hook with a 3mm ball end, which loosely holds the bangle, allowing the interior dimensions to expand or contract as needed. Easy to take on and off. As your collection grows, adding medals is a breeze, simply slip the medal's jump ring over the hook end onto the bracelet. A 4.7mm ball end ensures medals stay on the completed bracelet. Purchase is for bangle bracelet only, no medals included.