John Deere M141785 Standard Lawn Mower Blades, Set of 3 are designed for 400 Series, Front-Mount, and Compact Utility John Deere Mowers. These blades are manufactured with a unique combination of carbon and boron, providing exceptional hardness for a long life and a sharp edge without breakage. John Deere conducts extensive testing to ensure wear resistance and longevity for all their products. This set includes three John Deere equipment manufacturer (OEM) blades, specifically fitting 60" deck models 425, 445, and 455. For assistance in finding the right John Deere part or accessory, John Deere specialists are available Monday through Friday from 8:00 AM to 5:00 PM (EST) by calling 800-345-2396 or via email. Hartville Hardware strives to ensure the accuracy of the parts and sources information from reliable systems, though parts and compatibility may change without notice. Model Number: M141785