Get professional results on everything from heavy duty fabrics to lightweight knits with the Strong & Tough Serger from Brother. The extra hard, high durability metal blade is manufactured of carbon steel that can cut evenly and smoothly, even through multiple layers of denim. The heavy duty metal frame provides stability while serging at high speeds, and durability for many years of extended use. The ST4031HD gives you the creative freedom to serge layers of denim, difficult knits and other tough projects with ease. Main Features Reliable, high performance, 3 or 4 thread serger tackles heavy duty projects such as multiple layers of denim with ease High durability blade Made from extra hard metal produces a smoother cut edge, for a more Professional finish Heavy duty metal frame interior and metal thread antenna for enhanced durability Large extension table helps prevent heavy fabric from pulling the needle and thread, for better finishing Includes standard foot, blind stitch foot and gathering foot for a wide range of uses such as finishing seams, Serging decorative edges, and creating Gathers on knits and woven fabrics