Abstract: A device to be mounted permanently or removably to the side wall of a rolling tool cart for the carrying of tools and other shop paraphernalia such as extension cords, solder rolls, masking tape, and hand tools. The device has a peripheral rectangular frame of four framing segments, which frame is integrated with and surrounds a forwardly raised portion with an inclined surround interposed there between. The panel has a series of rows and columns with ?-inch spaced bores for the conventional mounting of tools and other shop items. The top of the frame has a flange that fit over a lip of a rolling tool cart. Two legs, vertically adjustably mounted outside of the central portion on the side framing, each have a bottom flange to engage a downward depending edge of a tool cart side wall.