What is a French clasp earring?

A French clasp earring is a pierced earring with a uniquely designed backing. Specifically, the French clasp is a curved wire mounted on a hinge that fits over the post after you insert the earring. Also called the French clip, the hardware helps to keep earrings from rotating or bending in a piercing. On 1stDibs, find an assortment of French clip earrings.