QualityParts From Oregon That you can depend on. Center hole: 5/8": Requires 1, 91-918 blade and 1, 91-917 blade for 48" cut; Rear discharge; High-lift: The aggressive blade angle increases air flow to push debris up-and-out for superior bagging or side discharge; Provides a right-hand cut; Replacement for major brand: Walker; Oregon Equipment Parts 91-918 Blade Walker 25In[524]