Guaranteed to fit Brother Serger Models:
640D, 730, 730D, 730DE, 760, 760D, 760DE, 900D, 920, 920D, 934, 934D, 9700LD, PL1050, PL1500, PL1600, PL2000, PL950

Guaranteed to fit Husqvarna Viking Serger Machine Models:
1000, 1000L, 560, 560ED, 560EDT, 650, 660CD, 700, 800, 900