The MTD 7420504 is a genuine 21-inch high-lift blade designed for optimal bagging and discharge performance on various MTD, Cub Cadet, Troy-Bilt, Yard-Man, Huskee, and Bolens walk-behind lawn mowers. This durable blade features a 6-point star center hole for secure mounting and is engineered to create a strong airflow for efficient grass collection. With a length of 533.4 mm and a width of 63.5 mm, it ensures a clean and effective cut for 21-inch mower decks.