The Brother Bias Tape Folder for Serger allows you to fold and attach 12mm or 12.7mm (1/2″) wide bias tape in one easy step. It works with both self-made and store-bought bias tape up to 1/2″ in width, making it perfect for adding neat, professional-looking edges to your sewing projects quickly and efficiently. This tool is a must-have for any serger user looking to streamline the bias tape application process.