Answer:
I'm a ruler with 12 agents. Half of them work in the darkness. Who am I?
I am used to bat with, yet I never get a hit. I am near a ball, yet never thrown. What am I?
What has to be broken before you can use it?
Brown I am and much admired. Many horses have I tried. Tire a horse and worry a man, tell me this riddle if you can. What am I?
Everyone asks for me but yet everyone hates to face me. For someone I am agony for others I am relief. Who am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.