Love your old sears 5-1/8" Jointer Planer but cant find blades? 

Well problem solved. 

This High Performance set will get you back to work.

Steel Grade - V2-HSS
Length - 5-3/16"
Width - 7/8"
Thickness - 2mm
Set of 2 Blades
Fits - Older Craftsman Jointer 149.236320, 3 Slotted Holes Per Knife Using sear blades 4550-092-70
Brand - Titan Knife