The Patchwork Seam Guide makes it a breeze to sew accurate seams when patchworking.The guide is simply screwed onto the bed of the machine to the right of the feed dog.The guide rail allows the Patchwork Seam Guide to be pushed right up against the edge of the presser foot or at a fixed distance from the presser. This edge guide makes it possible to sew precisely aligned hems and seams, even on long pieces of fabric. Whats more, this tool is the ideal partner for Patchwork Foot #37 from the BERNINA special sewing accessories range, a combination allowing you create professional quality patchwork projects in next to no time.