humanoid servo robot hand

humanoid robot hand with only one servo.
you'll need M3 nuts and bolts for the joints.
4 rubber bands threaded to the lead holes on the back of the fingers and tied to the two holes on the basis of each finger, and to the hole at the edge of finger 3 part.
4 strings tied to the servo and to the front edge of finger 3 part. the strings are threaded throw finger 2 part.
the 3 holes on the side are for connecting the hand to whatever you need.
here's a link for the Youtube video demonstrating the final thing-
https://www.youtube.com/shorts/Kd40Tye3eSs