The Bernina Roll and shell hemmer foot #69 (4mm) is a special presser foot for hemming soft fabrics such as tricot.
With the aid of a scroll, it turns the fabric under twice, holding it together securely in the channel guide in the sole of the foot until it is sewn. The result is a narrow, slightly three-dimensional hem.
Depending on your choice of stitch, the Bernina Roll and shell hemmer foot #69 (4mm) can also sew a scalloped hem. In addition, it is suitable for sewing on lace and trim.