Detailed Description  The machine is suitable for straight seaming,zigzag,embroidery,abutted,bar tacking,overedge seaming,zipper inserting seaming on thin and medium fabrics,etc.The needle position can be adjusted between the right and the leftto make teautiful decorative designs.The machine adopts built - in thread winder and has a reverse-needle-device.9mm zigzag stitch width on 20U33,12mm zigzag stitch width on 20U43