This pair of the 3 RU Kendall Howard Adjustable Standoff Bracket is designed to solve the issue of your rack being too deep or too shallow. This Adjustable Standoff Bracket can be set to a minimum depth of 3.5" to a maximum or 6" allowing for more mounting options. Constructed from 16-gauge steel, these mounts are durable, strong, and dependable, as well as being compatible with all EIA 19 and 23" wide server racks or wall mounts.