This model is derived form JK-4400. The long arm flat bed gives a wider working space. The presser foot can be lifted manually or by foot treadle. The bobbin winder on top an in may act according to the factory operation requirements making to order operation extra wide middle of the machine head makes the sewing operation very pours sews in front of the nose is the push button type switch easy. It features smooth machine running, low noise and machine durability, available for stitching car covers, car seats, safety belts, matt tents, parachutes, gliding parachutes, sails and other large work piece.