A box clasp is a type of jewelry fastener commonly used in necklaces and bracelets. It consists of two interlocking parts: a box and a tongue. The tongue fits into the box, creating a secure closure that is easy to open and close. This design is popular for its durability and sleek appearance. Box clasps are often made from various materials, including metal, plastic, or gemstones. They can be found in many styles, making them suitable for both casual and formal jewelry. Their reliable mechanism ensures that the jewelry stays securely fastened during wear.