Replace worn out parts and ensure your riding lawn mower operates at top performance with these John Deere lawnmower blades. The steel alloy blades have optimized balance to reduce vibration, along with a durable design for lasting use and added safety. Designed for an improved lifting of grass and consistent cutting action, this package of two blades offers a superior fit with any John Deere riding lawn mower with 42" decks. It also replaces OEM part number 20850. John Deere® products are available and can only be sold via authorized dealers.