The AYP 138497 is a genuine OEM lawn mower blade, measuring 21 inches (533.4 mm) in length. This blade is engineered for optimal cutting performance and durability, ensuring a clean and efficient cut for your lawn mower. It features a 5-point star center hole, commonly found on various AYP, Craftsman, Husqvarna, and Poulan mowers. Constructed from robust materials, this blade provides reliable service and maintains sharpness over extended use, making it an essential replacement part for maintaining your lawn equipment.