The Oregon 91381 is a high-quality genuine Oregon mower blade, engineered for durability and efficient cutting performance. This blade measures 520.7mm (20.5 inches) in length, 57.15mm (2.25 inches) in width, and 3.81mm (0.150 inches) in thickness. It features a 15.875mm (5/8 inch) center hole, along with two 9.525mm (3/8 inch) outer holes spaced 47.625mm (1.875 inches) center-to-center. It serves as a reliable replacement for many 42-inch cutting decks across various lawn and garden equipment brands, ensuring a clean and precise cut for optimal lawn maintenance.