3D Printed Wrench Wednesday Question

Happy Wrench Wednesday!  Today’s challenge, first person to identify what was 3D printed in this picture will receive a 3D printed crescent wrench.  Bonus question…who would win in a fight between Batman and Captain America, and why?  Most creative answer will also win a 3D printed crescent wrench.  

Batman vs. Captain America Which item was 3D Printed?

Batman vs. Captain America Which item was 3D Printed?