On the left side, one can observe the Step-3 of Hub Cap. In this step, one could observe the bowling of sheet after Step-2 of Hub Cap. The upper die is moving downwards and one can see the changes in the red sheet after Step-2. On the right side, the yellow part shows the upper die and on the bottom side of the screen the green part shows the lower die. The grey and red parts in the middle, shows the initial and the final sheet respectively before and after step-2.