The Imperial 30246 Griddle Thermostat Knob is a manual control used with compatible commercial griddle equipment. It provides the operator with a convenient interface for adjusting the thermostat setting and selecting the desired cooking temperature. The knob connects to the thermostat control shaft, allowing temperature adjustments to be made during normal griddle operation. https://partsfe.com/knob-thermostat-for-imperial-part-30246