Heavy Duty Swing Shuttle Thick Thread Cylinder Bed Sewing Machine DS-441 Product Description 1. This machine is the Hercules in the extremely thick material series. Adopt comprehensive feeding mode and cylindrical seaming table. 2. The feeding force is strong and stable, it can sew multi-layer heavy materials easily, and the stitch is precise and beautiful. 3. It adopts imported large swing special shuttle, with a large amount of bobbin thread and high sewing efficiency. 4. The bobbin winding device is located at the upper part of the machine head, with the presser foot lifting capacity up to 20mm. It can be used to sew handles, baseball covers, sports equipment, safety bags, sofas, tents, cushions, bags and other thick and extremely thick materials.