Answer:
An iron horse with a flaxen tail. The faster the horse runs, the shorter his tail becomes.
There are two meanings to me. With one I may need to be broken, with the other I hold on. My favorite characteristic is my charming dimple.
Different lights do make me strange, thus into different sizes I will change.
A hole leading in, a hole leading out, we connect to a cavern that is slimy all throughout. What are we?
A dragons tooth in a mortals hand, I kill, I maim, I divide the land.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?