The Toro 1155581 is an authentic OEM flat washer designed for secure fastening and load distribution in a wide range of Toro machinery. This precision-engineered washer helps prevent loosening of components, ensuring the integrity and reliable performance of your equipment. It is an essential component for maintenance and repairs across numerous Toro lawn mowers, utility vehicles, and other outdoor power equipment, including models from the Z Master, GrandStand, Workman, and TimeCutter series.