The SINGER® ruffle attachment is used to create perfectly spaced pleats and gathers. It makes uniform pleats at set intervals and can tuck every twelfth stitch, sixth stitch, every stitch or not at all! The SINGER® ruffler attachment works best with light to medium weight fabrics. Move the ruffle regulator to determine the frequency of tucks (it can tuck every twelfth stitch, sixth stitch, every stitch or not at all). Turn the adjusting screw to determine how much fabric is pushed into the attachment each time it tucks. It is a genuine SINGER® for use with low-shank sewing machines.