Push open to put circular carabiners on and take off. Use for your custom pendants. Use like a bail for cuban link chains, crosses, and more. Simple elegant design. Use instead of jump rings, bails, or as an enhancer. It is sturdy. This clasp has the ability to extend a bracelet or a necklace chain, divide or double up a chain, combine multiple chains, or clip a charm or pendant onto a chain.