Using this extruded aluminum box is easy. First, open the box by removing the end - plates. Place your circuit board or project inside through the open end. If you have a custom PCB, just slide it into the built - in slots. No need to use screws, and it will stay stable. After placing your item, attach the end - plates back on using the provided screws. When it comes to customizing, feel free to remove the end - plates and cut out a new one from another material. Just be careful when handling sharp tools. For maintenance, keep the box clean by wiping it with a dry cloth. Avoid using harsh chemicals as they may damage the anodized finish. If you lose a screw, you can replace it with a 6mm - long, M2.5 - sized screw having a 0.45mm pitch.