Integrated feeding and automatic oil supply system; The automatic switching device for stitch size allows for convenient automatic switching between different stitch sizes during the sewing process; The large top mounted knob can easily adjust the interaction amount of the presser foot and automatically adjust the appropriate sewing speed; It has the functions of reverse stitching, needle patching, dense stitching, and reinforced stitching, and is easy to operate. "S" represents the form of presser foot; Suitable for sewing various materials such as car seat cushions, sofas, fabric furniture, tents, umbrellas, and canvas.