Here is a pic of a tool rack to hold some of my crimping tools.
I used 1″ PVC pipe. Just drill all the way through with the body drill sized for the screw you elect to use to mount it, and then drill one side of the pipe large enough to pass the head of the screw.
If you use a longer screw, and drill only out to the body size of the screw you could put small round stuff in it. Using large pipe it could be a rack for a bottles of solvent or liquid electrical tape, flash lights or whatever.