Adjustable Wire Mobile Workstation - Pullout Tray. This heavy-duty rolling wire utility cart makes for a sturdy, versatile, and mobile workstation. The top shelf provides a stable platform for your monitor. The middle shelf serves as a pull-out keyboard tray and mouse shelf. The bottom shelf is perfect for a printer and/or storage while the CPU platform provides a great place for your computer. Features include sturdy, chrome-plated steel construction and high-quality3" swivel casters (two with locking brakes).