Suitable for sewing double holes, four holes, or vertical buttons to shirts, suits, underwear, coats, overalls and so on. If attached, sew the nail, handle and other buttons. The utility model is suitable for light, medium and heavy material nail buckles in the clothing industry. Single pedal start, automatic presser foot, automatic line cutting, sewing nails solid and reliable, easy maintenance. The utility model is suitable for synchronously changing nails, words and crosses without changing plates.