This is just a basic Wall hanging pocket to organize small tools for use around a desk or even a 3d Printer - nothing fancy. The sides have cutouts to allow visible access into the pockets. I'm sure everyone has dropped a small part into these and forgotten about it because it was out of sight and mind. All corners are rounded to add printing strain relief. The base has a non-flat surface to reduce platen contact surface area and thus reduce the pain of removing the finished item. Hope someone finds this useful besides myself.