Hollow Tool

Ribbon menu Bodies tab Features container Hollow Tool
or
Build Bodies/Geometry Hollow Tool
Hollows out one or more faces of a solid object to create a shell. As you hollow an object, you can specify the thickness of the remaining shell and the faces to be hollowed. You can also specify that Adams View add material to the outside of the object. In this case, Adams View uses the original object as a mold. Adams View adds material of the specified thickness to the original object and then takes the original object away, leaving a shell.
 
Note:  
You can hollow any object that has a face. You cannot hollow spheres, revolutions, or Construction geometry
 
For the option:
Do the following:
Thickness
Specify the thickness of the remaining shell after you hollow the object.
Inside
Clear if you want to add the shell to the outside of the object.