Package includes: 8 pieces slide clasps lockglod+Silver 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