I wanted speakers in the back without cutting my original panels, so I decided to build a box to put them in. As I went along I realized that I could kill two birds with one shot. I angled the back to follow the contour of the rear seat. It gives it a wider and more stable base. It holds most of my tools and a few small survival propducts and a tow strap. The center of the top is a door that lifts up. I was happy with it, maybe an idea for some else to improve upon.