Necklace Extender - Fancy Rhinestone Silvertone (3") NON-RETURNABLE: This item cannot be returned. Please contact Customer Service with any additional questions. This hard to find style of necklace extender lets you add 3 inches to the length of your fold over clasp closure necklaces! Necklace Extender - Fancy Rhinestone Silver (3") is made for necklaces with fold over clasps. Each extender features 18 prong set round cut rhinestones. Available in Silver Tone and Gold Tone versions; shop them both for more versatility!