Another important thing to mention is that according to Sacred Scripture, none of Jesus' bones were broken. Therefore, the nail might have passed thru one of the spaces of the anatomical wrist, were the bones are stronger - the base area of the hand.
The bones of the wrist, showing Destot's Space and the start of the "Z" space.
The Shroud of Turin clearly shows the area where Jesus might have been nailed:
And this representation is a good example of how He could have been nailed:
Figure 3 The nail entering the Z space that will exit exactly where the Shroud shows the exit wound.