QualityParts From Oregon That you can depend on. Center hole: 11/16": Aggressive blade angle increases air flow to push debris up and out for superior bagging or side discharge.; X-Tended Cutting Length™ optimizes the cutting efficiency with each revolution.; Gator Mulcher® provides cleaner, more efficient cutting performance can eliminate the need to bag, saving time and hassle.; Tungsten carbide is “fused” into the blade – creating an ultra-hard layer at the cutting edge and increasing the time between sharpening.; Replaces major brand: Dixon; Oregon Equipment Parts 496-399 Blade Dixon Gator G3