This Steel Keyboard Tray turns your wire shelving unit into a computer workstation! A mouse tray is included for extra comfort while working. Great for the garage as well!Steel Keyboard Tray. This keyboard drawer will attach easily to professional grade shelves that are at least 30" wide and 18" deep. Larger shelves may also be used for a bigger desk. The Keyboard Tray features durable steel construction with a black finish. The tray runs on furniture grade ball bearing slides that allow you to slide your keyboard in and out effortlessly. A slide out mouse tray holds your computer mouse and mouse pad and can be mounted to either the left or right side of the tray, making it perfect for everyone. The front of the keyboard drawer features a comfortable wrist rest with a flip open compartment for pens and other office supplies. Assembly is easy, and hardware is included.