Answer:
I have a lot to say but can't be heard because I can't speak one single word. What am I?
I hold two meanings. With one I may be broken, with the other I hold on. What am I?
If you break me, I'll not stop working. If you can touch me, my work is done. What am I?
What is the difference between a poorly dressed man on a bike, and a well-dressed man on a unicycle?
Four fingers and a thumb, yet flesh and blood I have none. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.