Enermax 3.5 Inch Drive Bay for Dual 2.5 Inch SATA/SAS HDD Mobile Rack, Built-in RAID 0 / RAID 1 / JBOD / Nor mode for high speed, back up and high capacity,  EMK3203 Patented Non-Scratch SATA connector Gold-plated SATA connectors Firm grip SATA III and SAS ready Hot-swap system SATA & SAS HDD Compatible 50,000 times HDD plug and eject guaranteed SATA 6.0G (SATA III) hard drives compatible Easy drive plug-in and ejection mechanism Security key locks