Box Corner

When using my laptop outside, I needed something to shade the screen to eliminate the glare. Using a cardboard box, I taped the sides and put my laptop into it. It worked great but the tape did not hold well. That's when I came up with this idea. Although it holds well enough, I included a hole in the tab so that you can push a pencil through the hole to force the cardboard to interfere with the bracket. This will make it a little more secure as the pushed in cardboard will make a little more interference fit. If you really want the most secure, you can attach a bolt and nut through the hole.