This item should be shipped with plastic brackets. I had shorted two packs of clamps. I contacted Revane but instead of taking care of anything, Revane insisted that I contact the carrier. I emailed the carrier and waited a few days but still no reply. It's frustrating to buy something to organize your stuff and now you can add extra parts of an unassembled shelf to the clutter without having a clear idea if a solution to this problem is coming soon.