The sharp point penetrates all types of fabrics for a professional serged finish. Works with polyester, cotton, rayon, and polyester/cotton blend threads. Use the needle system recommended by your serger manufacturer.,,This needle is compatible with:,,Babylock - All BL-3 series, EF405, EF405M,Janome - 603, 603A,Mammylock - 334, 334D,Pfaff - 603, 603A,Pinnock - P1/P2, PBL1, PBL4, PBL4-436DF, PBL4-543DF