Sister Hook Medium Belcher Chain - 36inFoundra sister hook medium belcher chain in yellow gold. Crafted in 18K Yellow Gold, this 36" Medium Belcher Necklace can be worn alone or with an added pendant on the Sister Hooks. The necklace is composed of our medium belcher chain and anchored to the chain are sister hooks that fit perfectly intertwined with each other. The name Sister Hook describes a pair of hooks fitted together so that one hook makes the other hook more secure. Its often used