The BERNINA Patchwork Foot # 97 is designed for straight-stitching and is ideal for sewing ¼ or â?? seam allowances and top stitching. It is available for BERNINA machines that have a maximum stitch width of 9mm. The foot print of the sole fits perfectly with the feeding system for the most accurate feeding and stitching when piecing patchwork blocks on a 9mm BERNINA machine.The Patchwork Foot #97 has an optional move-able seam guide. If the Patchwork Foot #97 comes as a standard accessory with a BERNINA machine, then the seam guide has to be bought separately.