Real brass plated with bright gold. Using a jump ring or split ring, attach the chain extender to the end of your necklace. You can fasten the necklace clasp to any part of the extender for an adjustable fit. Quantity: 5 extenders. Does not include jump ring or clasp. Photo shows complete extender chain. Measurements: each extender is two inches long, plus an 11mm drop tag on the end. Chain is 4.8mm wide.