The Whirlpool W10837249 Dishwasher Lower Spray Arm used to distribute water evenly across the lower section of the dishwasher for effective cleaning. Installed at the bottom of the dishwasher tub, the spray arm rotates as pressurized water flows through its openings, directing water toward dishes, cookware, and other items during the wash cycle. Proper spray action used to remove food... https://www.hnkparts.com/w10837249-whirlpool-arm-spray