Powerful unison feed rnechanism, the machine can sew accurately and easily several sheets of heavy weight materials pilled together. The lift of presser foot is upto 2Ornm, suitable for stitching the extra heavy-weight materials. The sewing area is upto 404 mm, suitable for stitching the huge articles. Applied the semi-rotary large shuttle & bobbin, could reduce the frequency of changing the bobbin thread, and increase the sewing efficiency. Suitable for stitching all the extra heavy-weight materials, such as safety belts, tents, seati ngs, shoes, bags,golf bags, etc.