About this 3D model

The original ceiling blade bracket broke, but instead of buying one of equally poor resistance, I made a new one out of ABS. The 3D printed part is actually stronger than the metal one. How do I know that? I loaded another metal bracket of the same fan until it broke. Then I did the same thing to the plastic one, but it did not break under the same load. I ended making 2 brackets, but I now have the confidence it won't break in use.