On this page you are offered a plan for a tool holder rack from scrap that can be mounted on the wall.
If you look at the picture, you can see that it is about a piece of metal with an L-shaped cross-section in which holes are made for storing various tools (screwdrivers, brushes, wrenches, etc.) and keeping them organized and within easy reach.
254mm (10'') x 40mm (1 9/16'') x 40mm (1 9/16'')
You can make this item by bending sheet metal or cutting from a steel tubr with rectangular cross-section. The plan contains two variations of the tool holder rack: one model has holes that are drilled and the other has edge notches that are cut. The holes/edge notches should be adjusted to tool dimensions and shapes. Either of the presented tool holder rack models has two holes on the vertical surface that will help you mount it on the wall.