2 Gator Mulcher 3-in-1 Blades to Replace the 134149, 138971 Blade. Craftsman, AYP (set of 2) Price is for a set of 2 Geniune Gator 3-In-1 blades. All Oregon blades are austemper heat treated. 20% harder steel for extended blade life. 21" long, 2.50" wide, .187" thick, star hole.