The heat booster grate sits in the bottom of the charcoal pan leaving an air pocket below the charcoal, which provides better airflow. This results in a hotter and more evenly burning charcoal Ashes drop through the grate, prolonging the burning rate of the charcoal for more efficient and economical use. Designed for use with Brinkmann and Cook'N Ca'jun vertical smokers. Does not work with Gourmet charcoal or Cook'N Ca'jun S-80 models.