he clasp is the mechanism used to attach both ends of the chain together. The style of clasp used by the jeweler usually depends on the item. There are many different styles of clasps including the widely used barrel, lobster claw and spring ring.
Basics to making jewellery - how to use a folding crimp. Folding crimps are used to fix your jewellery design to a clasp. They're used on thicker threads that can't fit into crimps or calottes - Come si usano le chiusure per i cordini
Basics to making jewellery - how to use a calotte/clamshell. Clamshells are used to attach your jewellery design to a clasp. They're great for multi-stranded jewellery or strings and threads like nymo which can wear away when you use finishes like crimps.