A purse fastener, also known as a CLASP, is a device used to secure the opening of a purse or handbag. It typically consists of two interlocking pieces that are connected by a hinge and can be opened and closed with a snap or button. The most common type of CLASP is the metal CLASP, which is usually made of brass or nickel-plated steel. Other types of clasps include magnetic clasps, plastic clasps, and Velcro clasps. Clasps are an essential part of any purse or handbag, providing security and convenience for the user.