This model is necessary for knitting sewing operations, four-needle six-threads dedicated to your unique flexible ,flat and high-intensity patchwork effect, with sylinder bed and the walking-type pressure foot it's easy to sewing high elastic fabric and departed sewing program ,according to the different fabrics and uses a single-cut or double-cut type accordingly, equiped with a small servo motor,this is the only choise in the pursuit of high quality sewing and simple operational.