QualityParts From Oregon That you can depend on. Center hole: 5/8": Enhanced mulching for bagging and discharge efficiency; Stays sharp and durable; High Lift, notched blade; Use 3 blades for 60" deck and 2 blades for 41" deck; Major brand replacement: Country Clipper; Oregon Equipment Parts 92-166 BLADE,COUNTRY CLIPPER H-2885,2