Answer:
What has 4 fingers and a thumb but isn't alive?
I am the beginning of eternity the end of time and space the beginning of every end the end of every place.
I shift around though always slowly. I never move more than a few inches at a time. A large movement by me can kill many people. I am huge yet unseen by humans.
I am an insect half of my name is another insect. I am similar to the name of a famous band.
I have a brother. However much we run we do not reach each other.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.