The AllPoints Foodservice Parts & Supplies 221041 Control Knob & Dial is designed for reliable operation in foodservice environments. This rotary knob features an on/off function, measuring 2 inches in outer diameter. It includes a .25-inch diameter double D-stem for easy installation and compatibility with various equipment. Made from heat-resistant plastic, this knob ensures durability and longevity, making it an essential component for efficient kitchen operations.