Predator Lawn Mower Replacement Blade. Predator blades provide superior mulching capabilities compared to traditional mulching blades. The airflow tooth design increases blade strength while providing more airflow for a finer cut. Predator blades are 25-40% harder than standard lawn mower blades. Predator blades provide greater bending resistance. (3) 72 in. cutting blades. CH 5/8 in. Width 2-1/2 in. Thickness .250 Length 24-1/2 in.