Approximately 1.5mm Chain Thickness with Signature Lobster Ring Clasps Stamped Sterling Silver .925 Two pairs included that Extends Necklace or Bracelet up to 2" Strong, Durable and Long-Lasting Sterling Necklace Extenders. Perfect for Very Fine Chains Fronay Collection design recognized for its high end quality This bracelet extenders sterling silver necklace extender is not like other extenders. Fronay Collection has designed this extension with dual luxury lobster clasps and measures 2 inch. Can also be used to extend that bracelet you just don't want to let go of!