FY515 is a powerful and versatile overlocking machine that offers a wide range of stitching options. With its ability to use two, three, or four threads, it provides flexibility in creating different types of stitches. The serger is perfect for professional seamstresses and hobbyists alike, as it can handle various fabric types and thicknesses with ease. Whether you're working on garments, home decor, or crafts, this serger will help you achieve professional results every time. Durable Metal Construction: FY515 is constructed with a sturdy metal frame, ensuring long-lasting performance and reliability for tackling heavy-duty sewing projects 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 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