These replacement blades were designed for use exclusively in the Gingher Seam Ripper (sold separately). They feature a new and improved edge grind that cuts through a variety of threads and fabrics with ease. The single piece construction of the blade and slider mechanism provides more stability when cutting; and make it easy to change the blade in your Gingher Seam Ripper when worn. This package contains two replacement blades. Caution: Sharp Blade. Handle with care. Imported.