The Ryobi Electric Tools 039858011099 Fan Speed Switch & Circuit Board Assembly helps control fan speed and electrical functions in compatible Ryobi equipment. The assembly combines the speed switch and circuit board to support proper control and operation of the connected fan system. It is a practical replacement for a worn, damaged, or faulty assembly that may cause inconsistent spe... https://www.wholetoolbox.com/ryobi-electric-tools-039858011099-fan-speed-switch-circuit-board-assembly/039858011099.html