Answer:
In buckles or lace, they help set the pace. The farther you go, the thinner they grow.
It cannot be seen, it weighs nothing, but when put into a barrel, it makes it lighter.
It can pierce the best armor and make swords crumble with a rub, yet for all its power It can't harm a wooden club.
Salty water everywhere but not sea in sight.
What flies forever, Rests never?
Why was the cook arrested?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?