Through this forging process we can lower manufacturing prices by forging only part of the piece.
Unlike previous forging methods that are made by hot processes, this also can be done by cold forging. It consists on accumulating material in a specific and limited area of a piece (usually in bar form).
Therefore, a direct consequence of this forging process is that it decreases the length of the initial bar and increases the cross-section thereof in the depressed area. If the process is done by cold forging and at the ends of the pieces it is called cold heading.