This Syba 5.25" tray less SATA III 3.5" HDD mobile rack allows you to install a 3.5" SATA drive in an unused 5.25" drive bay. To remove the HDD drive, just simply open the front panel doo and the HDD will eject out. To install the HDD, simply insert the drive (connector first) until the door closes. The hot swap bay offers a tray less design that makes it the ideal solution for quick and easy drive removals and insertions as part of a system building process, or integration into rack mount systems or industrial environments. To maximize performance and utilize the full speed potential of your SATA III hard drives, this HDD Backplane supports SATA III for transfer speeds up to 6 Gbps when paired with compatible controller.