Tacsew GC6-6 Walking Foot Feed Industrial Upholstery Sewing Machine, M Bobbins, 1/2" FootLift, 8mm Stitch Length, Reverse, AutoOil, PowerStand 1600SPM Single straight needle, top and bottom feed to avoid slippage between different material layers Straight Lockstitch, 0-8mm Stitch Length Auto Oil Fully Automatic Lubrication Big Bobbin M Style Industrial Upholstery Sewing Machine, Reverse