The Addonics Diamond hard drive kit offers the highest quality external enclosure available for SATA drives. An optional 5.25" 'Mobile Rack' component allows the enclosure to slide seamlessly into a tower or server even as part of a hot-swappable RAID. As stated on their website, this drive kit makes any SATA drive into a portable data store. The kit works modularly to allow for USB, SATA, eSATA, IDE, or SCSI connexion. Given the quality construction and impressive flexibility, the Addonics Diamond kit is well worth the price.