The FFD 2X2X2 tool works on the free form.
The use of these tools is used to stretch the free models.
Step1: Create a box and click modify tab then select FFD2X2X2 tool.
Fig.25
Step2: Click on the flip arrow of the FFD 2X2X2 tool. Then select control point option.
Fig.26
Step3: Select move tool and select control point.
Fig.27
Step4: After that, click on Z-axis and Drag up side.
Fig.28
These types of shapes can also be made from this tool.