For heavier work, the most common type of sewing machine is the single needle, walking foot lockstitch machine. Top and bottom feed and a foot height adjuster allows it to sew from medium to heavyweight fabric. For sewing leather, upholstery, canvas, and synthetics, the 4510SW offers the whole package. Low noise and vibration design, foot height adjuster, outstanding build quality and reliability, and the industries #1 DC servomotor.