SINGER HEAVY DUTY SEWING MACHINE HEAVY DUTY METAL FRAME: The Singer 4423 heavy-duty sewing machine is a true workhorse. With a heavy-duty metal interior frame, stainless steel bedframe, extra-high sewing speed, and powerful motor, this sewing machine can sew through a variety of heavy weight fabrics and provides long lasting stability. SEWING MACHINE ACCESSORIES: A variety of accessories are included, which includes 👉All-purpose foot 👉Zipper foot 👉Buttonhole foot 👉Button sewing foot 👉Seam r