The MTD 7420607 is a genuine OEM left-hand cutting blade, specifically designed for various MTD, Cub Cadet, and Troy-Bilt lawn tractors. This high-quality blade measures 20.5 inches (approximately 520.7 mm) in length and features a 6-point star center hole for secure attachment. It is engineered to provide efficient cutting and mulching performance, ensuring a clean and even cut for your lawn. Regular replacement of worn blades is crucial for optimal mower performance and safety.