The MTD 7420118 is a genuine OEM lawn mower blade, engineered for optimal cutting performance and longevity. This 21-inch (533.4 mm) blade features a 6-point star center hole, ensuring a secure fit on compatible MTD, Cub Cadet, Troy-Bilt, and Craftsman lawn mowers. Manufactured from high-quality steel, it provides a clean and efficient cut, making it an essential replacement part for maintaining your lawn equipment.