Oregon 90-698 Gator G3 Lawn Mower Blade, 18-1/8-Inch, Replaces Snapper, Simplicity and More Center hole: 3/4" 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. Replacement for major brand: Snapper