The present invention provides a portable, mountable utility case that mounts on top of, and, in combination with, the handle of wheeled luggage, rolling tool bags and hand trucks for anyone who requires a portable work station. The portable utility case mounts to the top of the handle of the vertical, telescopic or non-telescopic support members of wheeled luggage, rolling tool bags and hand trucks and secured to the handle by means of an integral, mechanical clamping device. The universal design of the mechanical clamping device can accommodate handles of varying widths and thicknesses.