The darning foot with the darning stitch plate for the b08 Straight Stitch machine is ideal for working with heavy fabrics. The darning foot makes darning work on smaller holes and tears almost a piece of cake. It also makes free-motion embroidery and free-motion quilting a breeze. Its bouncing mechanism with the vertical spring presses the fabric down firmly. This prevents the material from pulling up during the sewing process and ensures a clean stitch pattern.