"OREGON" UNIVERSAL 3-IN-1GATOR MULCHER BLADE*21"*3-in-1 patented design makesbagging easier*Cuts finer mulch and aids inbetter discharge*Fusion tungsten carbidecutting edge stays sharptwice as long*Fusion blades sharpen aseasily as standard blades*Universal blade fits 20"walk behind mower decks*Clamshell