Tray-less designs have always been a trade-off between convenience and security, but that''s not the case for TurboSwap MB171SP-B. The ICYDOCK TurboSwap MB171SP-B keeps all the benefits of the tray-less design with superior build quality, improved cooling efficiency and its unique shock absorbing design for maximum stability. It fits any standard 5.25" bay and is built rugged with all metal design to take a beating. This lockable mobile rack is designed for rugged applications such as medical & military systems, industrial PCs and servers. It includes features such as drive power button, ultra-slim 80mm cooling fan, fan speed control and optional screw holes for an add-on 120mm cooling fan which can be great for gamers and power users seeking a hot-swap bay built in to their system with SATA III support.The benefits of tray-less combined with stability There are many benefits to having a tray-less design; it allows you to quickly swap the drives without the fuss of rewiring or installing trays onto your drives. Reliability and stability of tray-less mechanisms are always a concern as it''s necessary to add moving parts. The TurboSwap MB171SP-B takes this into consideration and allows you to hot-swap drives within seconds, while maintaining outstanding drive stability and overall reliability. The Ultra-Flex shock absorbing kit provides excellent drive support whether it''s a half-height drive or a full size drive; it stabilizes the drive and absorbs vibrations. For increased reliability, we''ve simplified and reengineered the ejection mechanism with all metal arms to create a strong product that''s built to last. Setup is incredibly simple: just insert this unit into a single 5.25" bay, secure the unit in with screws, plug a 15pin power cable + 7 pin SATA cable, and you''re good to go.