The Vantec NexStar SE MRK-515ST 2.5" SATA Hard Drive Rack is a tool-less removable enclosure designed to hold 2.5-inch SATA drives. Constructed from a combination of metal and plastic materials, this black hard drive rack is compatible with drives ranging from 7mm to 15mm in thickness. It features a hot-pluggable design, making it easy to insert and remove drives without the need for additional tools. With its SATA interface and compact design, this unit is ideal for organizing and storing your hard drive collection in a neat and efficient manner.