The Oregon 91393 is a genuine standard lawn mower blade, engineered for durability and efficient cutting. Measuring 520.7mm (20-1/2 inches) in length, 57.15mm (2-1/4 inches) in width, and 3.81mm (0.150 inches) in thickness, it features a 15.875mm (5/8 inch) center hole. This blade is a direct replacement for multiple OEM part numbers, ensuring a precise fit and reliable performance for compatible lawn equipment.