specialty： 1、Usage ideal for boots, sports shoes, work shoes, leisure shoe, foam rubber sole pads, babies shoes and high quality leather shoes. 2、Double wheel and needle feeding facilitates smooth sewing operation of upper and lower leather, ensures continuous supply of wheel and needle ensures constant working ability. 3、The combined action of wheel and needle ensures constant stitches in both thick and thin sewing operation. 4、Needle feeding ensures constant supply of leather whether it is sewn thick or thin and whether it moves straight forward or makes toms. 5、When spongy material is sewn, it will lot crinkle or transform; Instead, it shall be sewn very smoothly and neatly. 6、Low friction between the parts because ball and needle bearings are used, consequently, the service life is long when properly lubricated.