Features: * Includes the 2 required blades for rider mowers (two 21 in. for 42 in. mowers) * Install in minutes * Austempered for an edge that stays sharp longer * Built to original equipment specifications * Star hole center * 21 inch length What"s In The Box: * Arnold AYP-42M-BS 21-Inch Star Hole Mulch Blade - 2-Pack