Oregon Set of 3, Genuine Gator 3-in-1 Mulcher Blades to Replace Craftsman, Poulan, Husqvarna Blade 180054, 173920, 173921, 532180054, 532173920, 532173921. Set of 3 Gator 3-In1 Mulcher Blades for 48" decks, Craftsman, Poulan Pro, Husqvarna All Oregon Gator blades are austemper heat treated, 20 per cent harder steel for extended blade life. 16-11-16" Long, 2-1/2" Wide, .203" Thick. 5 point star hole.