The ICY Dock ToughArmor EX MB492SKL-B dual bay mobile rack is built for industrial small form factor systems that require exceptional drive security. It uses heavy-duty metal construction, which is considered to comply with flammability requirements and is capable to withstand the harsh environments. The metal key lock prevents unauthorized access to your important drives and the thumb screw lock adds extra protection from impact, and reduces drive tray vibration which increases drive stability during transportation. The removable drive tray allows interchangeability of data between multiple systems. It is the perfect storage device for enterprise small form factor applications. It maximizes space in industrial small PCs, surveillance, embedded systems, automation systems, aerospace systems and mobile DVR systems.