These durable 20-1/2-inch lawn mower blades are expertly crafted to deliver a sharp, precise cut, leaving your lawn with a professional finish. Designed to fit Exmark lawn mowers with a 1/2-inch center hole, they ensure a secure and hassle-free installation. Manufactured to meet OEM standards (603283, 603874), these blades provide long-lasting reliability and performance for a consistently pristine lawn.