The secure wall mount rack provides 2U of usable rack space anywhere it's needed. A solid steel lock bar and pad lock (customer supplied) prevents unauthorized access to the equipment. A highly motivated, shady character will require some serious tools to get into this rack. The secure wall mount rack can be used to mount equipment horizontally or vertically. The wall mount rack is compatible with most OEM slide rails: Dell, HP, IBM, Apple, Sun, Intel, Cisco, Juniper and 3Com. The rack is compatible with round hole, threaded hole, and square hole equipment and slides.