Guaranteed to fit Husqvarna Viking Serger Models:
Huskylock s15

Guaranteed to fit Pfaff Serger Models:
Hobbylock 2.0, Hobbylock 4762, Coverlock 4772

Guaranteed to fit Singer Serger Models:
14CG744, 14CG754, 14ET754, 14HD854, 14SH644, 14SH654, 14SH744, 14SH754, 14SH764, 14U454, 14U544, 14U554, 14U555, 850SCH

Alternate Part Numbers: 620116796