Protex Safe Fingerprint Wall Safe (FW-1814Z) Burglary Resistant wall safe with fingerprint locking system. The FW-1814Z is equipped with state-of-the-art fingerprint reader for secure and easy operation. Motorized locking bolt system will open the door automatically. Designed to be installed between 16 Inches o/c wall studs ; 2 Removable shelves Approximately .44 cubic feet of storage space.