This is 3D posthetic arm or hand 3d parts. You can use this to make a real look hand in your school college projects. Explore the wonders of robotics and anatomy with 3D printed Prosthetic Hand. This  DIY (Do It Yourself) kit is useful to understand the working of the real prosthethic hand. This kit contains 3D Printed parts only.
Video Link -
The 3D Prints
https://youtu.be/kSo3lUqHvGM?si=JTeC5o4cYHpHZUqi