2/3/4 Thread Capability: FEIYUE FY515 serger machine is designed to handle a variety of sewing projects with different thread thicknesses, allowing you to sew with different types of fabrics and create a variety of stitch patterns Durable Metal Construction: FY515 is constructed with a sturdy metal frame, ensuring long-lasting performance and reliability for tackling heavy-duty sewing projects Exceptional Cutting Precision: The serger from the Strong & Tough series features a high-durability blade made from extra hard carbon steel. It delivers precise cutting, resulting in a smooth and clean edge for a professional finish User-Friendly Threading System: FY515 is designed with color-coded thread guides and numbered upper and lower thread loopers, making it easy to thread and reducing setup time Efficient Sewing Speed: With a maximum sewing speed of up to 1,200 stitches per minute, the FY515 allows for faster sewing, enabling users to complete projects in less time FEIYUE FY515 Serger overlock machine is a versatile and durable machine that is perfect for various sewing projects. It features a 2/3/4 thread capability, LED light, heavy-duty metal frame, 1,200 stitches per minute, adjustable differential feed, adjustable stitch length, built-in rolled hem, and FEIYUE FY515 Serger overlock machine is easy to use and comes with a user manual and warranty. It is a great choice for beginners and experienced sewers alike.