Full rotary axe and shuttle, suitable for coarse thread sewing, strong and durable mechanism design, suitable for sewing large and extremely thick materials.Precise feeding when sewing, the upper and lower materials will not slip, so after sewing it is beautiful.Large rotary shuttle, up and down feeding to make sewing thick material more easily.It is suitable for sewing of container bags, tents, chair cushions, polishing wheels (cloth wheels), car canopies, tarpaulins, suitcases and bags, jeans and so on.