QualityParts From Oregon That you can depend on. Center hole: 6 point star, 5/8": Requires 1, 98-069 blade and 2, 98-054 blades for 46" cut; Center blade for 46" cut model series 600 and 800 built since 1997; Enhanced hardening to keep the blade sharper and more durable; Made to exact OEM specifications; Replaces major brand: MTD; Oregon Equipment Parts 98-069 Blade Mtd 942-0645 14-13/16I