The T-7M1-SATA 5.25" to 3.5" & 2.5" SATA/SAS 6.0 Gb/s Hotswap Rack from iStarUSA is an aluminum lockable and hot-swappable mobile hard drive rack. It has a built-in 80mm cooling fan for extra cooling in poor operating conditions. An LED indicator enables power monitoring and hard drive activities. This model has a lockable tray that is constructed from plastic.