Lobster clasp size: 10mm/12mm Extention chain length: 55mm Note: The end is either heart or drop shape. Description: Silver: Rhodium Plated Gold: 18K Gold Plated Black: Palladium Plated Rose Gold: Palladium Plated over Brass  Usage: For the bracelet, necklace, or other crafts, jewelry makings Gold Filled, Rhodium-plated and Palladium-plated findings have a precious metal look. Exquisite craft and unique design, use it as necklaces, bracelets, or earring components.