Serge with confidence on multiple layers of denim, layered knits, and heavy-duty fabrics with this heavy-duty Brother Serger. The ST4031HD is a durable, heavy-duty serger that is made from high-quality metal inside and out. This is a 3 or 4 thread serger that allows users the flexibility to handle thick materials with ease, yet has the precision to work with lightweight fabrics. The Brother ST4031HD includes a high-durability blade made from carbon steel that can cut a smooth, clean edge though multiple fabrics without hassle. The strong interior metal frame helps ensure your serger remains stable on your work surface, even at very high speeds. The wide, detachable table built into the ST4031HD keeps heavy fabrics on a level surface with the needle, helping to prevent excess pulling on the needle and thread for better finishing. The Brother Serger allows you to get more serging done quicker by sewing up to 1,300 stitches per minute. To adjust the speed, simply apply less pressure on the foot controller to suit your individual comfort level. This serger works with either 3 or 4 threads for added flexibility. For example, 4 threads are useful for a strong overlock seam on woven material and 3 threads for overlock stitching on knits or suits. The color-coded guides printed on the machine show you exactly where to place each thread for trouble-free threading. The Brother ST4031HD comes with large spools of serger thread, sewing feet, a soft cover, an accessory bag with a needle set, 4 thread spool caps, 4 thread nets, tweezers, a cleaning brush, a hexagonal driver, a trim trap, a foot controller pedal, an instructional DVD, and an instruction manual. Metal frame: The ST4031HD is a strong, reliable serger built to tackle heavy duty projects with its sturdy metal frame High performance: This Strong Tough series 3-4 thread serger has a high durability blade made from extra hard carbon steel, producing a smoother cut edge and a clean, professional finish 1,300 Stitches per minute: Get more serging done in less time with a maximum sewing speed of up to 1,300 stitches per minute Easy to thread: Color-coded thread guides along with numbered upper and lower thread loopers make the ST4031HD easy to use Included accessory feet: 3 accessory feet come with the ST4031HD including standard, blind stitch, and gathering feet along with a large extension table for bigger projects This product is intended for sale only in the US at 120 volts, and any other use or sale voids the warranty.