Here is a small steel rack I built for my shop since my other one is full. Used 1.5" X 1.5" angle. I made a couple ladder type ends connected with an x brace on the back. Openings are 7" x 7". Then I added a couple extra pcs. to make extra openings which are now 3.5" x 7"w. I was going to tie it into the wall but it is surprisingly stable so it stands alone.1130021304.jpg1130021541.jpg