SI 9910 single needle shuttle hook for sewing machine typical sewing machine

Adopts double idler wheels and needle feed materials at the same time,strong slope climbing force, small change of needle.It can sew sponge ,thin leather with even ,smooth and inflexibility.It adopts ball and needle bearing with fine needle bearing with fine lubrication,little attrition,low noise and long life,thin leather with even,smooth and inflexibility.It adopts ball and needle bearing with fine lubrication ,little attrition,low noise and long life.Suitable for sewing riding boot,gym shoes,leisure,sponge shoes,baby's shoes,high grade leather shoes and all kinds of cases.