Full metal protection. Making sure that the material used is designed in a way where it can be relied upon for many years after its deployment. The MB991SK-B is capable of holding up in the harshest environments, with the heavy duty metal construction throughout the entire device. The ToughArmor's full metal design is perfect for industrial devices that may require a flammability rating as the full metal material is considered to already comply with flammability requirements. So because of the high build quality, it can be used various enterprise systems including: military and law enforcement deployment, as well as manufacturing conditions such as embedded control systems and factory automation systems including: military and law enforcement deployment, as well as manufacturing conditions such as embedded control systems and factory automation systems. The full metal design also allows heat dissipation transfer from the hard drives throughout the mobile rack. In addition, Multi-Flow technology effectively routes air flow correctly for excellent passive cooling in key ventilation slots on the front, rear, top and bottom. Lastly, Anti-Vibration technology and EMI grounding are used to provide a stable environment for the hard drives or SSDs used to perform at its best. Efficient space use. The MB991SK-B is perfect for use in industrial PCs, SMB SFF servers, mobile DVR systems, or even home servers. These systems tend to use components that provide the needed features, in the smallest form factor available. The ability to house one SATA SSD or HDD in a single 3.5" bay makes it a valuable asset in specific applications such as, integration into an industrial imaging or medical device. Convenient utility and accessibility. The front of the ToughArmor includes a status LED when the drive is powered on, off and accessed. Active Power Technology (APT) allows the status LED to be on only when a hard drive is inserted into the enclosure. For drive security, the eagle-hook lock system on the tray makes sure your hard drives will not eject when not needed. Additionally, the 2 segment key lock provides extra protection to theft of hard drives as well as safeguards any sensitive data. The EZ slide mini trays make drive interchangeability and maintenance completely hassles free, in case of a hard drive failure. With a simple swap of the hard drive, your overall down time is greatly reduced especially if this occurs when it is time sensitive. The trays are also designed to accommodate 7 to 15 mm height hard drive and SSD, creating a 2.5" hot swap bay for any standard SATA hard drives and SSDs. While the tray is not installed to the MB991SK-B, the anti-dust flap feature helps prevent dust from entering into the mobile rack.