Buckles are fastening devices typically made of metal or plastic, used to secure two ends of a strap or belt. They come in various shapes and sizes, allowing for easy adjustment and closure. Commonly found on clothing, bags, and shoes, buckles provide both functionality and decorative appeal. The most familiar type of buckle is the belt buckle, which holds a belt in place around the waist. Other types include shoe buckles, which secure footwear, and buckle straps used in backpacks. Buckles have been used for centuries, evolving in design and materials to meet modern needs.