The MTD 6920091 is a genuine OEM reinforced lawn mower blade, measuring 460mm (18 inches) in length. This durable blade features a 4-point star center hole and two 8.5mm outer holes with a 63.5mm center distance, designed for select walk-behind lawn mowers from MTD, Cub Cadet, Troy-Bilt, and other compatible brands. With a width of 57mm and a thickness of 3.5mm, it ensures efficient grass cutting and long-lasting performance.