The rack is a plywood box with a back made from pegboard for extra tool storage. A pair of holders inside the box accept chisels and screwdrivers. And a tray at the top corrals other items you want to keep handy. The rack mounts to the side of the workbench with heavy-duty slides.
After sizing the parts, cut dadoes in the sides for the top, bottom, and tool holders. Then cut a groove in the top, bottom, and sides to accept the pegboard back. (There’s also one more groove in the bottom for a hardboard lip.)
Some options for tool holders are shown here. You can design these parts to hold the tools you have.