Sunbelt B1EP1029 21-in. XHT Mower Blade for 21-in. Decks is designed for walk-behind mower decks with a 21-inch cut, making it i for brands like AYP and Husqvarna. This blade measures 21 inches in length and 2-1/4 inches in width, featuring a 5/8-inch diameter center hole and a medium lift profile. The blade is crafted from Sunbelt’s XHT (Xtreme Hardness & Toughness) steel, which undergoes a patented Marbain® heat treatment. This process enhances the blade's hardness and toughness, resulting in a cutting edge that remains sharper for longer and resists bending and impact damage standard blades. XHT blades are approximately 25% to 40% harder than typical lawnmower blades, ensuring precise cutting performance comparable to equipment blades. This blade is equivalent to AYP and Husqvarna part numbers 165833, 175064, 189023, and 406712, as well as Oregon 95-057, Rotary 9810, and Stens 340-248, providing a reliable option. Model Number: B1EP1029