The Toro 110146 Lawn Mower Drive Blade Pulley helps transfer rotational power to the mower blade for consistent cutting performance. Mounted within the drive system, the pulley works with the belt and related components to transmit engine power and maintain proper blade rotation during operation. A properly functioning pulley supports smooth power transfer and helps the cutting system... https://www.wholetoolbox.com/toro-110146-lawn-mower-drive-blade-pulley