Same as the TR-01 8 Transformer Cart but with the ability to install an optional Sliding K/B & Mouse Tray. Cart is held together by four vertical posts which attach to a Bottom, Middle and Top Shelf by using telescopic locks operated with a 5/32 Allen wrench. All accessories are attached in the same manner. Middle Shelf, Handles, Rack Mounts and all available accessories can be adjusted to your desired height. Additional Rack Mounts may be installed on rear section of cart for additional accessories. Custom size vertical poles may be ordered to change height of cart.