QualityParts From Oregon That you can depend on. Center hole: bow-tie: Use for 20" walk-behind mower; Enhanced hardening to keep the blade sharper and more durable; High-lift: The aggressive blade angle increases air flow to push debris up-and-out for superior bagging or side discharge; Replacement for major brand: Bolens, MTD, Cub Cadet; ; Oregon Equipment Parts 98-068 Blade Mtd 942-0640 20In[341]