Easy to use magnetic closure. Simply attach necklaces end to end using the clasps provided and layer up to 3 necklaces at the same time. How to attach: one side has circular rings to attach your necklaces’ clasps onto. The other side has clasps to attach the ends of your necklaces onto. Necklaces should be 1-2" apart and differing lengths. For example, layer necklaces that are 14", 16", and 18" in length, etc. Detangler: 1” .