You will be the first to know when you need it. I needed it my first trip. I couldn't pull through because of location of phone co. post and I couldn't back out because it rained and I was on gravely ground and rear wheels spun. Reached over turned knob and backed out. Been in a couple other places where after a severe amount of rain and parked on grass it wasn't worth trying to move for the trouble of turning a knob especially when the motor holme across the street was sunk up to the rims. If you don't have it you won't use it. If you do have it you might use it.