Athena Power BRK-HD322 3.5 inch to 2x 2.5 inch Hard Drive Bracket - NEW Athena BRK-HD322Drive Bay1 x 3.5 to 2 x 2.5 Dimensions(W x H x D) 3.97 x 0.78 x 4.41. Athena Power has released a series of rackmount brackets to meet the needs of system engineers. These universal brackets are able to support multiple drives. Athena Poweras rackmount brackets have a range from 5.25" to 3.5". Model number BRK-HD322 converts a 3.5" bay to house up to 2 x 2.5" hard drives. This bracket is designed for smaller rackmounts and can be used for NAS and HTPC systems.Install more hard drives in your desktop PC system with this dual HDD adapter bracket from Athena Power! Giving you the ability to install not one, but two 2.5" laptop drives in your desktop system, this adapter bracket is perfect for home theater and rackmount systems that need high capacity storage in a compact space!