The Snapsafe in Wall Safe is designed to be mounting between two studs, securing directly to the studs. The pre drilled holes make installation a breeze. Made with high quality 16 gauge steel and a pry resistant door the SnapSafe In Wall is a great way to conceal your firearms safely and securely as well as other valuables. Requires 4AA batteries (Not Included). FeaturesConstructed of 16 gauge steel body and 9 gauge steel doorElectronic lock with key backupBlack powder coat finishTwo storage shelvesMagnetic jewelry slip and document holder included