Bernina Patchwork Foot with Guide F #57Dwith guide #57DFor patchwork projects with seam allowances of 3 mm (1/8″) or 6 mm (¼”)Three notches on the side for precise guidanceThe guide allows perfectly straight lines to be sewnFor 9 mm machines with BERNINA Dual Feed systemPatchwork foot with guide #57D differs from Patchwork foot #37 only in that it has a built-in seam guide along the right edge of the foot. It is therefore particularly suitable for patchwork projects with 1/4″ (6mm) or 1/8″ (3mm) seam allowances.Other precision sewing techniques requiring a perfectly straight seam also benefit from the use of Patchwork foot with guide #57D. Here, the edge guide is placed directly against the fabric edge or seam line to yield straight spacings and lines when sewing.