The Oregon 91383 is a high-quality replacement mower blade, engineered for durability and efficient cutting. Measuring 546.1 mm (21-1/2 inches) in length, this blade features a 5-point star center hole, ensuring a precise fit on compatible John Deere lawn tractors. It replaces several OEM part numbers including John Deere M84472, M84473, M112991, M112992, M112993, M112994, M112995, and M112996. Ideal for maintaining a clean and even cut, this blade is a reliable choice for lawn care professionals and homeowners.