Original Simanco Edgesticher number 36865 Attachment Fits any of the Singer sewing machines that I have for sale. Fits in place of standard presser foot. This combined Edge-Stitching, Lace-Joining and Piping attachment must be kept accurately on the extreme edge of the material. The slots are guides for sewing together laces, insertions and embroideries, sewing in position hemmed or folded edges, piping or sewing flat braid to a garment. The distance of the line of stitching from the edge of the material in the slots, can be regulated by pushing the blue spring lug to the right or the left. Further instructions can be found in the Attachments Section of the machine's User’s Manual.