Use the 3.5" Drive Tray With Key Lock to quickly and securely install 2.5" and 3.5" solid-state and hard drives into select QNAP devices. Constructed from black plastic, this tray includes screws for both 2.5" and 3.5" drives and helps to streamline hot-swapping. Compatible devices include the QNAP TS-x51+ and TR-004. Applied Models: TL-D800C, TL-D800S, TL-D400S, TL-D1600S, TVS-h1288X, TVS-h1688X, TS-x73A, TS-832PX, TVS-675