This Necklace Extension Chain Set Features 3 Different length extender chains in 3 length, 2 inch, 4 inch and 6 inch, Chain width 1mm. Made of 925 Sterling Silver, available in 3 colors; Silver, Yellow Gold and Rose Gold Flashed. Tarnish Free and Nickel Free and Secured by Spring Ring Clasps. These necklace extenders are good for expanding the size of necklaces, bracelets or anklets to best fit with your length. Easy to use with simple classic spring ring clasps, easy to put on or take off, convenient to use. This is a Must to add to your jewelry collections.