QualityParts From Oregon That you can depend on. Center hole: 5/8": Requires 3 blades for 44" cut; Use with Iron Eagle or Silver Eagle for 50" classic x-style blade; Enhanced hardening to keep the blade sharper and more durable; Made to exact OEM specifications; Replacement for major brand: Dixie Chopper; Oregon Equipment Parts 91-525 Blade Dixie Chopper 17In[427]