Oregon 91-604 Gator G3 Lawn Mower Mulching Blade, 21-7/16-Inch, Replaces John Deere Center hole: 13/16" Aggressive blade angle increases air flow to push debris up and out for superior bagging or side discharge. Gator Mulcher provides cleaner, more efficient cutting performance can eliminate the need to bag, saving time and hassle. Replaces major brand: John Deere