Features The Lockable Rackmount Drawer is ideal for securing and storing all the stuff that you would usually sit on top of some equipment in the Server Rack. The Lockable Rackmount Drawer is available in three different sizes ranging from 2U to 4U. There are also additional models available with an open front for items that do not need to be secured. A lockable box is available and can be used to store various items such as small laptops.