Attach and remove the guides as needed to suit your task at hand- gives you three feet in one- a Quarter Inch Foot, Ditch Quilting, and Clear foot. Use the foot alone for 1/8 inch piecing. Attach the 1/4 inch seam guide for 1/4 inch piecing. Attach the ditch quilting guide for ditch quilting. For computerized machines: A unique oval-shaped needle hole allows scant 1/4 inch seams and metric piecing. Fits virtually all Janome top-loading model sewing machines. Janome Part Number: 200449001