know how to delete permissions from lists and doclibs. Simply i can use the breakroleinheritance, and i can remove every user. But i couldn't find a way to do this with a site.

Lets say the $site =new-object Microsoft.SharePoint.SPSite (http://spt/spaces/thisisit)

$site don't have inheritance method. (or i just don't know how to use it)

So how can i delete every permission on a site? Not on the lists, not on the doclibs, bot on the site itself?

I know how to delete permissions from lists and document libraries. Simply I can use the BreakRoleInheritance, and I can remove every user. But I couldn't find a way to do this with a site.

Like this: $site =new-object Microsoft.SharePoint.SPSite (http://spt/spaces/thisisit)

$site doesn't have inheritance method (or I just don't know how to use it).

So how can I delete every permission on a site? Not on the lists, not on the document libraries, but on the site itself?