This 4-bay 3.5" SATA/SAS backplane, installed into three standard 5.25" front drive bays, makes it easy to swap 3.5" SATA or SAS drives in and out of your server or desktop computer. It features a trayless design that saves you installation time and enables you to insert or remove drives as needed. With its durable plastic and aluminum construction, it provides a cost-effective solution for drive maintenance and interchangeability of data between multiple systems. Hot-swap drives easily This 4-bay backplane is ideal for IT professionals, such as system administrators or computer operators, for quickly swapping drives. With support for both SATA and SAS 3.5" drives, it saves valuable time in environments where storage drives need to be replaced or removed regularly, such as in server rooms and data centers. The hot-swap backplane is a cost-effective solution for large deployments of system builds or upgrades, for organizations looking to stretch their IT budget. Valuable drive protection The protective backplane is engineered with a plastic and aluminum design to safeguard your drives. Two built-in fans and ventilation help to optimize heat dissipation, to help protect your drives. Fast data transfers To maximize the speed and performance of your drives, the mobile rack supports SAS I and II and SATA I, II and III, providing data transfer speeds up to 6Gbps when paired with a compatible controller. The HSB43SATSASB is backed by a StarTech.com 2-year warranty and free lifetime technical support.