3mm Snap-on Hemmer Foot 98-694818-00 - Pfaff Hemming prevents the edges from fraying and results in a clean, durable edge. With the Rolled Hem Foot, you can hem light to medium weight fabrics for clothing and home decorating items without having to pre-iron the fabric edges. 1. Select a straight stitch, snap on the Rolled Hem Foot. If needed, press only the beginning of the hem to 3 mm wide. Place it flat in the groove under the foot and sew a few stitches. Lower the needle into the fabric to hold it in place. Then raise the presser foot and pull the cut edge of the fabric into the scroll of the hemmer. Lower the foot and continue sewing while holding the cut edge up in front of the foot. 2. Do not allow fabric to run under the right half of the presser foot. This foot can be used on Pfaff machines with the IDT system, but not intended for the IDT system to be used. TIP: Hem crisp fabrics with a straight stitch. Hem soft fabrics with a zigzag that just encases the mm size of the hem. (Sharply curved areas are not suitable for this type hemmer.)