The SH39LK is 3U 9" deep rackmount locking storage drawer offers an "in-rack" storage solution for 19in racks and cabinets, that makes it easy to secure server hardware and rack/cabinet accessories. The 3U storage drawer features heavy duty steel construction and a locking front door, allowing you to secure mission critical hardware and accessories as needed. Requiring only 3U of space in any 19" rack/cabinet, the lockable drawer provides a storage solution with a smaller footprint than a full or even mid-size storage cabinet or wire rack - perfect for small server rooms or environments where space is at a minimum (but security is a must).