A buckle is a fastening device used to secure two ends of a strap or belt together. It typically consists of a frame and a prong or a hook that holds the strap in place. Buckles are commonly made from materials like metal, plastic, or leather and are found in various applications, including clothing, bags, and safety equipment. In addition to their practical use, buckles can also serve decorative purposes. They come in various designs and styles, allowing for personalization in fashion accessories. Some popular types of buckles include belt buckles, shoe buckles, and bag buckles.