Attach to one end of the necklace with a jumpring, then put a hook or lobster clasp on the other, and hook into the chain.
Make that short necklace a little longer. Gives more flexibility to choker lengths. Adjust the length to perfectly work with your neckline. 2 inches long.
Lead free. Nickel free.
Lead-free. Nickel-free. By the pack of 2.