Guide: You snap the shirt cuffs inside to inside. Cufflinks have a link between the front and back cover that is easily bent. It should be placed so that it deflects from the arm, then fit it perfectly to the fabric. Cufflinks are a pair of related men's jewelery that will hold together the shirt sleeve in an exclusive manner. Cufflinks are used in shirt with dubble folded cuff, but also works in simple weight cuff with extra buttonholes. Good Luck!