Thermaltake Max 3503 SATA HDD Rack solution is suitable for using in multiple 5.25” driver bays and maximizing the numbers of 2.5”/3.5” hard disks in the drive bays. To prevent unauthorized data access, the Max 3503 is special designed with security safeguard key lock. Additionally, with the removable tray design and hot-swap / hot-plug capabilities, the Max 3503 allows users to quickly retrieve the hard drives without even open their computer case, and eventually makes switch hard drives easier than ever.