Make necklaces longer or shorter to suit style and taste. Glue Rubber, Leather, Imitation Leather, Satin, or other cords into Light Tube Cord Ends with Beadalon BeadFix Gel or E-6000 glue. Finish Suede Cord or Organza ribbon with C-Crimp Extension Chain Ends. All Beadalon Cord Ends with Extension Chains are made of brass and lengthen necklaces up to 2".