Brother clear view foot vertical cat k use this presser foot where visibility of seams or pattern markings are desired perfect for topstitching decorative stitches patchwork piecing quilting appliqu1 attach the presser foot and select a stitch from satin or decorative stitches 2 line up the center guide mark on the presser foot over the desired seams or pattern markings 3 sew compatible with brother category k sewing machines