The Vantec NexStarSE MRK-525ST can fit two 2.5" drives inside a single 5.25" drive bay. Using the universal mounting tray, the MRK-525ST is hot-swappable and compatible with other Vantec NexStarSE 2.5" products. The MRK-525ST's metal enclosure helps dissipate heat while the plastic body makes it lightweight and easy to transport. The Vantec NexStarSE 525ST is for users who want a 2 x 2.5" to 5.25" drive rack that comes complete with all the cables and hardware necessary, making storage expansion solution simple and cost-effective.