Ariens 3PK Genuine OEM Gravely 04771200 52 Zero Turn Lawn Mower Blades. Product Dimensions: 19 x 4 x 4 inches. Item Weight: 5.7 pounds. Item model number: 04771200. Fits Ariens Models With 52 Deck: IKON X, IKON XL. Fits Gravely Models With 52 Deck: ZT X, ZT XL. Set of 3 OEM Blades.