This genuine MTD 21-inch mulching blade, part number 7420741A637, is engineered for efficient grass cutting and superior mulching performance. Constructed from durable materials, it features a precise 6-point star center hole ensuring a secure fit on compatible equipment. This OEM blade is designed for a wide range of MTD, Cub Cadet, Troy-Bilt, Yard Machines, Huskee, Bolens, White Outdoor, and Ryobi walk-behind lawn mowers with 21-inch decks. It is commonly cross-referenced with MTD part number 7420741A0637 and other equivalent numbers, providing reliable replacement for worn or damaged blades.