The Vintage Singer Buttonhole Attachment No. 121795 is a specialized sewing machine accessory designed specifically for Singer machines. This unit is a buttonholer that allows users to create precise and intricate buttonholes with ease. The original box and instructions included with the product ensure that users can effectively use this accessory to enhance their sewing projects. With the trusted Singer brand behind it, this buttonhole attachment is a reliable and high-quality addition to any sewing enthusiast's collection.