Features and Functions: Heavy-duty metal frame provides strength and stability for demanding serging projects Strong & Tough 3/4-thread serger features an extra-hard carbon steel blade for smooth cuts and professional finishes High-speed performance with up to 1,300 stitches per minute Color-coded thread guides and numbered loopers make threading easier Includes three accessory feet: standard, blind stitch, and gathering, plus a large extension table for bigger projects Description: Serge with confidence on multiple layers of denim, knits, and other heavy-duty fabrics with the Brother ST4031HD Heavy-Duty Serger. Built with high-quality metal construction inside and out, this durable machine is designed to power through thick materials while still delivering the precision needed for lightweight fabrics. The high-durability carbon steel blade trims clean, smooth edges through multiple layers with ease. A strong interior metal frame keeps the serger stable on your work surface, even at high speeds. The wide detachable table helps support heavy fabrics so they stay level with the needle, reducing pulling on the thread and improving stitch quality. Capable of sewing up to 1,300 stitches per minute, you can finish projects faster, and speed can be easily controlled with the foot pedal for comfort. Use 3 or 4 threads depending on your project. Four threads create strong overlock seams for woven fabrics, while three threads are ideal for knits and lighter materials. Color-coded guides printed directly on the machine make threading straightforward and stress-free. Included accessories add even more value. The ST4031HD comes with large serger thread spools, sewing feet, a soft cover, needle set, four spool caps, four thread nets, tweezers, cleaning brush, hexagonal driver, trim trap, foot controller, instructional DVD, and instruction manual.