Hot-swap any 3.5 inch SATA hard drive easily from any computer with a 5.25 inch bay. This is an internal S-ATA II HDD-ROM mobile rack which provides a 3.5’ HDD bay for 5.25’ drive bay. Strong structure, anti-shock and reliable design. No drivers or software required, supports hot swap, plug and play, easy to use. Trayless design, quickly and easily install or remove hard drives without opening the chassis.