Originally included with Bernette serger models:
B44 Funlock

Guaranteed to fit Elna Sewing Machine Models:
434, 444, 664 Pro, Easy Cover, EL444, eXcellence 680, eXcellence 720PRO, eXcellence 730PRO, eXcellence 740, eXcellence 760PRO, eXcellence 780, eXperience 520s, eXperience 540s, eXperience 550, eXperience 560, eXperience 570, eXperience 580, eXplore 150, eXplore 160, eXpressive 860, eXpressive 900, eXpressive 920, eXtend 264, eXtend 864 Air

Guaranteed to fit Janome Sewing Machine Models:
1000CP CoverPro, 1000CPX, 1110DX, 1110DX Pro, 1200D, 134D MyLock, 2000CPX CoverPro, 203 MyLock, 204D, 234D, 3434D Juno, 434DR, 634D, 644D, 644D-2, 7034D Magnolia, 734D, 744D MyLock, 7933, 8002D, 8933D, 9002D, 900CP CoverPro, 900CPX, 91002D, AT2000D, COMBI-DX502, CoverPro 3000P, Four-DLB, HD4BE, HF3434D, HF7933, HF9102D, M644D, MB-7, ML303, MOD-Serger (MOD-8933), PL644D-2

Guaranteed to fit Kenmore Sewing Machine Models:
385.16631, 385.16633790, 385.1664190, 385.16655100, 385.16677700

Guaranteed to fit Necchi Sewing Machine Models:
S34

Alternate Part Numbers: 797811003, 888804008, 5020405423