Answer:
You will find me with four legs, but no hair. People ride me for hours, but I don't go anywhere without needing to be tugged. Jerked or turned on, I always manage to be ready for work.
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.
What has three feet but no arms or legs?
What can be filled with empty hands?
This is rectangular, hollow and has a lid, and where you’ll find it you might wonder, it is just six feet under. What is it?
The warmer I am the fresher I am.