I was looking for an air tool rack. The average price I was seeing was between $20 - $30. I thought, I can make one of those & for a lot less than they were charging. Of course, I made it at TechShop
. First thing I did was go to a local metal supply store. They have a section they call the drop zone. If they have a 4' piece of stock & a customer comes in wanting a 3.5' piece, they cut the part for the customer & put the rest in the drop zone. The remnants found here are sold by weight. The total cost for this project including screws was less than $3. Now you could do this with a piece of sheet metal & bend it with a brake but then you have to worry about it being strong enough to hold what you want to hang from it. I eventually choose this design based on the scrap metal I found.