QualityParts From Oregon That you can depend on. Center hole: 7/8": For major brand Ford: Requires 3 blades for 72" cut; For major brand DR: Requires 3 blades for 42" cut; Enhanced hardening to keep the blade sharper and more durable; Made to exact OEM specifications; Replacement for major brands: Ford and DR; Oregon Equipment Parts 91-207 Blade Ford 24-1/2In[398]