Copperhead Mower Blades are a premium-grade, high carbon steel mower blade. Tempered for optimal hardness and durability. Precision sharpened cutting surface for a cleaner finer cut; Requires less power - Better fuel consumption & lower operating cost Blades exhibit less vibration - Cuts better, wears less, components lasts longer 50% more Airflow at Discharge Sharper blades = Healthier Lawns!