clasp

A clasp is a fastening device used to join two parts of an object, most often found on jewelry, clothing, bags, and other items that require secure closure. Clasps are designed to be opened and closed repeatedly and may rely on springs, hooks, catches, magnets, or toggles to hold two ends together.

Common types include:

- Jewelry clasps: lobster claw, spring ring, box clasp, toggle, magnetic, and sliding clasps.

- Clothing and accessories: hook-and-eye, snap clasps, and buckle clasps.

- Bags and purses: turn-lock clasps, kiss-lock frames, twist-locks, and hasps.

Construction and materials vary widely. Clasps are typically made of metal such as gold, silver, brass, or steel, but can also be produced from plastic, enamel, or combined with gemstones for decorative purposes. Some clasps are primarily functional, while others are designed to be visible elements of the item’s style.

Mechanisms used by clasps include latch-and-catch systems, hooks that fit into a ring or bar, magnetic closures, spring-loaded burs, and toggles that pass through a loop. The choice of clasp affects ease of use, security, and aesthetic appeal. For example, lobster clasps are common in jewelry for their reliability, while toggle clasps offer a decorative look but can be less secure on small or flexible strands.

Etymology traces the word clasp to older forms in Middle English, with roots possibly linked to Old Norse and French terms; the precise origin varies by language. Clasps have been used since ancient times and continue to serve both practical and ornamental roles.