Package:You will receive 4 magnetic sterling silver necklace clasps4 silver, strong, converter, size at 20 x 5mm or 0.8in x 0.2in. How to Use:Magnetic clasp no tools required to assemble the design just snap the round clasp to the end ring of the necklace, and then snap the necklace spring ring into the clasp. Magnetic Design:Each locking magnetic necklace clasp contains 2 pieces of magnetic parts They can easily attract together, so you don't have to button the necklace with your hand, which can save you time and energy, making you have a good experience. Wide Applications:These closure connector chain extenders are suitable for making some personalized necklaces, bracelets, anklets and more You can wear the jewelry you make with them to attend the upcoming birthday parties, proms, graduation parties, making you shine at the parties. Reliable Material:These magnetic necklace clasps are made of silver and magnet They are sturdy and solid, firm and strong, not easy to rust or be corrupted, and not easy to break, deform or bend, which can retain their colors and shape after a long time use.