Guaranteed to fit Elna Serger Models:
Easy Cover, 434, 444, 664 Pro, 796T-SM, EL444, eXtend 864 Air

Guaranteed to fit Janome Serger Models:
1000CP Cover Pro, 1000CPX Cover Pro, 1110DX, 1110DX PRO, 134D MyLock, 2000CPX CoverPro, 203 MyLock, 204D MyLock, 3434D Juno, 504D MyLock, 634D MyLock, 644D, 7034D Magnolia, 734D, 744D MyLock, 7933 Harmony, 793PG, 8002D, 888 Compulock, 8933D, 9002D, 900CP Cover Pro, 900CPX, 9002D, 91002D, AT2000D, CoverPro 3000P, Four-DLB, HD4BE, HF3434D, HF7933, M644D, MOD-Serger (MOD-8933)

Guaranteed to fit Kenmore Serger Models:
385.16633790, 385.16655100, 385.16677700

Guaranteed to fit Necchi Serger Models:
S34