I have mixed feelings regarding this extender.  I bought it originally for a Sterling Silver necklace I have, and love, but it's just not long enough.  The problem is that the picture is deceiving, and I thought the loops were larger than they really are.  The necklace I got it for, has larger loops and a toggle connector.  So when I got this, there was no way that the toggle would fit into the extenders loops.  However, the good news, is that I recently received a beautiful turquoise necklace, and this extender works with it just fine, because the necklace has a claw clasp.  So, I am happy I bought this.  Just make sure when you buy it, that it will work with your necklace, and keep in mind that the loops are not that big.