Maxpower 331519 Mulching Blade for 21" Cut MTD/Cub Cadet/Troy-Bilt Replaces 742-0563, 742-0721, 942-0563, 942-0721 Replaces OEM No. 742-0721, 942-0721 21 Inch Length; 27/32 Inch Center Hole Proudly Made in the USA Fits Yard Man and White, Models 410/425 Replaces #742-0721 21-Inch cut blade Carded