Answer:
Break me and I am better immediately set and harder to be broken again.
I have to be broken before I can be used
I go up and down at the same time. Up towards to sky and down towards the ground
If a man carried my burden, he would break his back. I am not big but leave silver in my tracks. What am I?
What has 4 fingers and a thumb but isn't alive?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.