Compared to traditional straight needle, these curved needle increase productivity by 40%, making it perfect for both mass production and small projects requiring fast stitching Works seamlessly with 1034D, 1134DW, 2034D, 3034D, 4234DT, 5234PRW, 925D, DZ1234, and other compatible overlock machines, suitable for garments, home decor, and Unlike regular sewing needle, the X77781+X77774 set uses special alloy materials for enhanced toughness and durability, reducing skipped stitches under heavy sewing pressure for stable This curved needle set features advanced bending design specifically for multi function overlock machines, enhancing stitching flexibility to handle complex fabrics with perfect seam results every time Ideal for X77781 and X77774 models Made from stainless steel, these needle resist wear and while maintaining shape The finely tip ensures smooth fabric penetration with minimal damage