When building your van, there are many times holes need to be drilled in the walls. The worst thing you can do is drill all the way through and put a big ole dimple or, even worse, a hole in the outside of your van! It is such a very easy thing to do and avoid. Just take a section of ½” PVC and cut it to the desired length. Slip it over the drill bit and you will now have a safe way to drill into the wall of your van without causing any damage to the outside.