The Whirlpool W10559476 is a replacement knob made for Whirlpool and Jenn-Air ranges and ovens. This is a simple but important component that controls your appliance's surface burners. By moving the knob, you can control the gas flow to the burner and vary the flame strength from low simmer to high boil. This control knob is often constructed of black plastic for a sleek and modern appearance that blends easily with your existing range. A working range knob is vital for safe and effective cooking. A broken or malfunctioning knob might make it difficult or even impossible to manage the burner flame, creating a safety risk and limiting your ability to precisely adjust heat for different recipes.