This Rosewill RX-C525 mobile rack is a convenient way to add hot-swappable storage to your computer. It can accommodate 3.5-inch SATA HDDs and features a trayless design for easy installation. The unit is also lockable for added security. The rack is made of durable aluminum and comes fully assembled, making it ready to use right out of the box. With its sleek black color and compatibility with SATA interfaces, it is a versatile addition to any computer setup.