Wall Safe, Hidden as Air Vent in Plain SightDetails: Fool criminals and keep your valuables safe. Makes access to your items simple, but in the last place anyone would look! The H. I. P. S. wall safe discretely hides behind a standard register vent cover. This product fits in between your standard studs and can be installed in minutes with no special tools. The wall vent safe also comes with a false wall so no one can see through the vent slots and inside your H. I. P. S. wall vent safe.