QualityParts From Oregon That you can depend on. Center hole: 1/2": Requires 3 blades for 42" or 44" cut; Requires 1, Oregon® 91-536 blade and 2, Oregon® 91-532 blades for 48" cut; High-lift: The aggressive blade angle increases air flow to push debris up-and-out for superior bagging or side discharge.; Superior mulching for bagging and discharge efficiency; Enhanced hardening to keep the blade sharper and more durable; Made to exact OEM specifications Oregon Equipment Parts 91-536 Blade Grasshopper 15In[494]