A W hook uses a double curve that grips a chain in two places, so it holds more firmly than a single hook. It suits longer necklaces and harams that carry some weight. Check that the curves are even, the ends are closed and the hook feels smooth against the skin. Match the size to your chain thickness, and test the grip before you buy. Wipe with a soft cloth and keep a spare in a smal... https://www.darjewellery.com/gold-jewellery/women/neckwear-accessories?f=subitem_name:W%20HOOK&sort=latest