Turn off vehicle and put it in gear. With the tool fully unfolded, lay it out in line with the tire that is stuck.
With the smooth surface of the short section down, push it between the tire and the rut.
Once properly positioned, very slowly accelerate. This allows the tire to pull the MotoTreads into the rut.
Now that the tire is on a solid gripping surface, you can drive out and to a safe location.