The Handle Control Knob consists of a grip or handle that is attached to a rotating shaft or spindle. As the handle is turned, it rotates the shaft which can activate or adjust the system it is connected to. The knob is mounted to a panel, surface, or housing using a bushing or collar that fits around the shaft. It is typically made of plastic.Attributes:• Impart a regular surface pattern on the outside of a part for gripping• Withstands vibration and shock loads encountered in vehiclesApplications:The Handle Control Knobs are often used to adjust the speed of motors, fans, and pumps.