The MTD 742-0760A-0637 Lawn Mower 3-IN-1 Blade cuts grass while supporting mulching, bagging, and side discharge on compatible mower decks. This blade mounts to the spindle and rotates during operation. It works by lifting grass with its curved edges and cutting it, while the design allows clippings to be processed based on the selected mowing mode. The airflow pattern helps manage clipping movement. Replacing a worn blade restores consistent cutting performance.