BERNINA Couching Insert for Foot #72With the Couching Inserts, you can creatively sew yarns, cords, and wool or felt threads on to your project. Enjoy easy couching using either a plexiglass ruler for guidance or the free motion technique. The inserts are for use with the Adjustable Ruler Foot #72 and are attached to the underside of the foot. The use of high quality materials makes the inserts very strong and protects the surface when quilting with metallic yarns and cords