The double pressure foot interacts with the teeth to feed up and down, making the sewing process smooth and effortless. Uniform and aesthetically pleasing stitching with good quality; Double the size of the kettle and shuttle, eliminating the hassle of frequently changing the bottom line of the shuttle, reducing waste of labor, and improving sewing efficiency; The fully automatic refueling cycle system can effectively reduce component wear, extend machine life, and operate smoothly without noise; Suitable for leather bags, gloves, leather jackets, awnings, etc.