THE STARK HAND:=
It is an artificial hand which is specially design for NASA. It moves easily and works like an electronic hand. The story behind the invention is like this:
A boy named Dave Vogt, when born has not his left hand by nature. A scientist Stark created an electronic hand for him and the hand has three knuckles (Which have a joint of a finger when the fist is closed). These knuckles can be bent according to the wish of the Vogt and he may catch the things easily. Interesting thing is that the Vogt may open all of his fingers freely by the moment of his shoulder that triggers a lever to extract. This artificial hand is really magical, because the Vogt may grip an egg with politeness and as well as drag a heavy chair.
When Vogt used this hand a ball is thrown towards him, he caught the ball with his artificial hand and certified that he is no more disabled and may do his work like a normal person.
http://ksp2347.blogspot.com