I have no head, yet I have teeth.
Don’t worry if I get stuck in a rut, it’s where I belong.
My bite can lay low the mightiest giants.
What am I?
Zzzz…Zzzz… you got it: A Saw! Chainsaw also fits the description and is correct.
This riddle was part of a contest for members of great online role-playing site, dndonlinegames.com. Congratulations Ytter! You were first to answer correctly, and have won an e-copy of The Wealding Word! I will contact you directly with details. Keep playing!