ICY DOCK ToughArmor EX MB492SKL-B Industrial Full Metal 2 x 2.5" SATA/SAS HDD & SSD Mobile Rack for 3.5" Front Device Bay with Key Lock & Thumb Screw Design. The ICY DOCK ToughArmor EX MB492SKL-B dual bay 2.5" mobile rack is built specifically 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 harshest environments. The metal key lock prevents unauthorized access your important drives and the thumb screw lock adds extra protection from impact, and reduces drive tray vibration which increases drive stability during transportation. Our removable drive tray allows interchangeability of data between multiple systems. The ICY DOCK MB492SKL-B supports both SAS and SATA hard drives/SSDs at 6Gbps and is backwards compatible to 3 Gbps drives and hosts. The MB492SKL-B fits two drives in a single 3.5" front bay making it 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. Black.