John Deere M139802 Medium Lift Mower Blades, Set of 2 are designed for 42-inch John Deere lawn mowers. These blades are crafted with a blend of carbon and boron, delivering exceptional hardness that ensures a long-lasting sharp edge without the risk of breakage. This set includes two John Deere equipment manufacturer (OEM) blades, providing reliable performance and durability for your mowing needs. 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 provide accurate part recommendations based on reliable sources, but compatibility may change without notice, so contacting customer support is if there is any uncertainty. Model Number: M139802