It's a decimated version of Adam's hands, taken from the famous masterpiece by Michelangelo The Creation of Adam, ready to be printed.
Turntable and close-ups are provided so you can see all the details that are going to be printed in the future.
The example of these printed hands can be found in the last pictures.
Contact me if you encounter any problems or you struggle with understanding how something should work, I'll do my best to help you :)
Happy printing, folks!