An annular die is a type of die used in metalworking and material processing that has a circular or ring-shaped opening. It is commonly used for forming or shaping cylindrical or tubular components. The annular die consists of an inner punch and an outer ring or die, which work together to deform the material as it is pressed or forced through the die opening. The annular die provides precise control over the dimensions and shape of the formed component, and it is often employed in processes such as tube drawing, extrusion, or rolling to create seamless tubes, rings, or other circular-shaped products.