Silver plated curb extender chain with a lobster clasp. Just attach the clasp of the extender chain onto the end of your necklace chain and clasp your necklace anywhere along the extender for a longer necklace.
Total overall length 2 3/4 inches. If you need a longer extender, you can use more than one on a necklace, or my handmade sterling extenders are longer.
Please note, these will not work with a necklace with a barrel or toggle clasp.