Reverse Modeling of rubber handle

 From the scan data, it is easy to see that this is symmetrical left and right, and front and back in powerful function of Design X.

So, just 1/4 symmetrical modeling was required.

For basic shape modeling, multiple sections were created, then applied  Loft, and after creating the inner base surface by Sweep, the internal grid shape was implemented by Extrude. 

 Applied Mirror twice.

 Finally, we modeled the assembly boss shape to complete the model.