The MTD 7420600 is a genuine 21-inch mulching blade designed for optimal cutting performance on various MTD, Cub Cadet, and Troy-Bilt lawn mower models. This durable blade features a 6-point star center hole and measures 533.4 mm in length, 57.15 mm in width, and 3.81 mm in thickness, with a weight of 0.907 kg. It is engineered to effectively cut and circulate grass clippings, promoting a healthier lawn. This blade replaces multiple OEM part numbers including 9420600 and 7420600A, ensuring a precise fit and reliable operation.