The Toro 108-7220-01 Lawn Mower Belt Guide keeps the drive belt aligned and positioned correctly during mower operation. This metal guide mounts near the pulley system and sits close to the belt path. It works by preventing the belt from slipping off or shifting out of place while the pulleys rotate. By maintaining proper belt tracking, it supports smooth power transfer within the system. Replacing a bent or damaged guide restores proper belt alignment and consistent mower operation.