Package includes: 8 pieces slide clasps lock, come with various colors, sizes are about 13 mm/ 0.51 inch for 2 strand lock clasps, 20 mm/ 0.79 inch for 3 strand lock clasps, 23 mm/ 0.91 inch for 4 strand lock clasps, 26 mm/ 1.02 inch for 5 strand lock clasps, the diameter of the clasp is 3 mm/ 0.12 inch and the thickness is 1 mm/ 0.04 inch, please confirm the size before buying^ Design: this clasp is a long tube shape, each half come with number of chain rings, you can add bracelet or necklace on it, will be a good choice to decorate jewelry, come with a box, convenient for you to storage^ Durable material: slide clasps locks are made of alloy, lightweight and not easy to fade, can use them for a long time, suitable for making multi-strand necklaces or other handmade jewelry^ How to install: tube can be opened by pulling the tubes apart and closed by sliding them back together, can provide connection points for multiple strands, easy to use when you diy jewelry^ Flexible and fun: you can wear it with any necklace and change it up at any time; Can help you create various combinations of layers and can keep the layered necklace from tangling when worn, will make you look more charming^