The Frigidaire 318242221 Top Burner Control Knob provides precise adjustment of burner settings on compatible ranges. This replacement knob fits onto the burner control shaft and turns the corresponding valve or switch to regulate the heat level of the selected surface burner. Clear setting indicators allow users to select the desired temperature range for cooking tasks such as simmering, boiling, or sautéing. A cracked, loose, or missing knob can make burner control difficult or inaccurate. Replacing the damaged knob restores proper control and provides a practical way to maintain convenient stovetop use. Designed for selected compatible range models, this replacement component supports accurate burner adjustment and dependable everyday cooking control.