Oregon 596-615 Gator Mulching G5 Small Engine Mower Blades X-Tended Cutting Length optimizes the cutting efficiency with each revolution Tungsten carbide is fused into the blade  creating an ultra-hard layer at the cutting edge and increasing the time between sharpening Center hole: 5 point star Gator Mulcher provides cleaner, more efficient cutting performance can eliminate the need to bag, saving time and hassle Replacement for major brand: Ariens