Tangle-free: The locking closure prevents your layered necklace from tangling when worn. Great for making multi-strand necklaces, bracelets or other DIY jewelry crafts. EASY TO USE: This clasp is a long tube shape, open the tube by pulling it apart, then close it by magnetic sliding - with multiple links per half, you can add a necklace or bracelet to it. KEEP NECKLACE SAFE: Compared with general magnetic clasp, this necklace connector is a sliding lock, which is more secure. Before you receive these magnetic tube locks, we have assembled the loop and lobster clasp. It saves you a lot of time. Once the necklace is attached, you can put on and take off all the layered necklaces at the same time by sliding in or out of the barrel. HIGH QUALITY MATERIAL: Made of brass, silver and gold plated, light and durable, not easy to fade, can be used for a long time.