This is a sterling silver necklace extender for all your lever clasp necklaces. I made this because a few customers of mine commented to me that they like to wear their jewelry in the winter (of course), but are turtle neck wearers. Their necklaces get a little snug when worn over their turtle necks, so the necklace extender was born. Simple add the clasp to the clasp already on your necklace and whola, a more comfortable fit. Available in 2, 3 & 4 inches.