QualityParts From Oregon That you can depend on. Center hole: 5/8": Requires 2 blades for 42" cut; Enhanced hardening to keep the blade sharper and more durable; Made to exact OEM specifications; Superior mulching for bagging and discharge efficiency; Replacement for major brand: Exmark and Toro; Oregon Equipment Parts 94-068 Blade Toro 106-2247-03 21-9/