Designed to feed multiple layers of fabric evenly without shifting the fabric itself, the Baby Lock Walking Foot is great for fabrics that slip, stretch, or ripple when turning curves. The Baby Lock Walking Foot has a top set of feed dogs that help feed the top layer of fabric, while the machine feed dogs feed the lower layer of fabric. The walking foot is best used with straight or zigzag stitch patterns and should only be used to feed forward. Reverse stitching should never be used with this foot. Note: When sewing with the Baby Lock Walking Foot, sew at medium to slow speeds.