Perfect for the Karabo Storage box dedicated drawer rail (set of 2) When you attach this product, the two fixing holes on the bottom row will be in the same place, and they will interfere with each other, so you will only be able to fix the top two. I had interference, so I was only able to fix the top two. The screws on the top row are quite thick and long, and they are strong, so you will need a lot of strength to tighten them by hand with a standard Phillips screwdriver. As the difference between the height of the screw holes and the height of the hangers is small, it is better to use a long bit of around 10cm with an electric screwdriver. If the screwdriver is too short, it will interfere with the screws and you won't be able to tighten them. Also, the screw holes in the upper section are also used for assembling the main body of the color box, so if you assemble the color box first and then attach the hangers, you will need to remove the screws on the main body and tighten the screws for the back hangers. You have some flexibility in terms of where you attach the hanger to the left and right, but if you attach the color box to the wall, the gap between the wall and the hanger will be narrow, so I attached it as far as possible on the other side of the wall. It seems to be made to be sturdy, so I don't think it will break, but I was surprised at how many things you have to think about when attaching it.