Control Knob Specifications this Knob Is Sold Individually. This Knob Takes A D-Shaped Shaft. This Part Works With The Following Products: This Part Works With The Following Products: Dryer, Washer. This Part Works With The Following Products: This Part Works With The Following Products: Whirlpool, Inglis. Part, Wp3957799 Replaces These: Part, Wp3957799 Replaces These: 3957799,8271339Cross Parts: 3957799, 8271339, Ps11742138