The Duke 153142 Convection Oven Control Knob Cook/Timer is designed to provide accurate adjustment of cooking and timing settings in compatible ovens. This control knob fits onto the control shaft and allows the user to set or adjust cooking modes and timer functions with a simple turn. It works by mechanically engaging the underlying control components, translating user input into specific settings for time or heat control. The Duke 153142 Convection Oven Control Knob Cook/Timer helps ensure ease of operation, supports accurate adjustments, and contributes to consistent cooking results while maintaining reliable performance in commercial kitchen environments.Fits Duke: 59 Series, 59-E3ZX, 59-EV