Upper Knife, Pfaff # 340406

Compatible with J.C. Penny Serger Machine Models:
928

Compatible with Mammylock Serger Machine Models:
ML1026 & PL1026

Compatible with National Serger Machine Models:
N30, N40, N50 & N50E

Compatible with Pfaff Serger Machine Models:
776, 783, 784, 785, 786, 787 & 788

Compatible with Supreme Serger Machine Models:
S928D