Easily connect and swap 2.5in and 3.5in SATA drives from a 5.25in front bay - This SATA hard drive dock/docking station can be mounted internally in a 5.25in computer drive bay, to provide simple access to 2.5in or 3.5in SATA hard drives. Featuring a convenient trayless design, the internal hard drive dock doesn't require that hard drives be mounted in an enclosure, saving time and hassle. Once the docking station is connected to the host computer, it's as simple as inserting the desired SATA hard drive into the slot(s) as needed for full access to the hard drive(s) as though installed conventionally within the computer case. 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. The HDD dock accommodates both 2.5in and 3.5in SATA hard drives and can support one of each at the same time. Plus, when the 3.5in slot is not in use, two 2.5in drives can be inserted simultaneously. The 5.25in bay-mounted SATA Hard Drive Dock features front panel power control, allowing you to power the drives on/off as needed.