Model TY 441 is suitable for sewing heavy weight materials such as safety belts, luggage, ... semi-rotary large capacity shuttle hook, suitable for sewing heavy weight materials. Used for harness, tack, saddlery, ... as high as 20mm, suitable for stitching the extra heavy-weight materials.The machine is provided with a ... Long-Arm, Cylinder-Bed, Unison-Feed, Extra Heavy Duty, Lockstitch Sewing Machine