Answer:
Used on a diamond and left on a board. It's great for a gymnast his grip to restore. What is 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 lies in a tunnel of darkness. That can only attack when pulled back?
Look into my face and I'm everybody. Scratch my back and I'm nobody.
I'm light as a feather, yet the strongest man can't hold me for more than 5 minutes.
The strangest creature you'll ever find: Two eyes in front and many many more behind.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?