The Bosch 11011646 Dishwasher Spray Arm is meant to help in the dishwashing process by evenly distributing water during the wash cycle. How it works is that it rotates to spray water over all the dishes to make sure that they are properly cleaned. This arm has a precise nozzle design to direct water pressure for better coverage. This part provides performance, saves energy, and ensures the same results for cleaner dishes, designed for durable and long-lasting and can be used as a better wash quality.