Safe to use Wheel Adapters 5 on 4" to 4.5"?

dual rear rims are just using a spacer on the original lug studs . not reclocking the lug pattern to another set of studs . there an accident waiting to happen . i made some out of steel to adapt my first 4.0 bc . they would flex a bit in hard driving . DSC07826.JPG DSC07827.JPG DSC07828.JPG DSC07829.JPG