Handler Mappings - Revert to parent

Regarding IIS 7.5/Server 2008 R2.

I have tried to use appcmd for manage a handler mapping and it works fine to create a "local" entry type.
I haven't found any way to manipulate this more with appcmd.

In this case  need to create an Inherited handler mapping.
Is there any way to achieve this with powershell and the "Revert To Parent" function as within the GUI ?

Thanks
Mikael