Cufflinks are decorative fasteners used to secure the cuffs of dress shirts, typically worn with French cuffs. They consist of two parts: a decorative face (which can be made of various materials like metal, glass, or enamel) and a back component (often a toggle, bar, or chain mechanism) that holds the cuff together. Cufflinks add a stylish and elegant touch to formal or semi-formal attire, offering a range of designs from simple and classic to intricate and personalized options. They're commonly used in professional, evening, or special event settings.