... tents, cushions, leather products; 2.Compound feed. Double-needle lockstitch sewing machine Model:SF20606Application:It is suitable for ... cushions, leather products, clothes, mats.Description:1.Adopting double needles, double large vertical auto-lubricating rotating, and sliding thread taking ... two parallel straight lock stitches. 3.Arm shaft and hook shaft are supported by ball bearing, making sure ...