SET OF 742-0616 Gator Mulcher 3-in-1 Blades for MTD & CUB CADET 942-0616 GATOR MULCHER BLADE 3 IN 1 MTD 21 3/16 Set of 2 Genuine Gator blade, 20% harder steel for extended blade life Oregon blades are austemper heat treated. Oregon 3-in-1 Mulcher blades to replace the 742-0616, 942-0616 blades used on 42" MTD decks.