If you have a trailer...and don't have one of these...you're missing the boat. I never had the need to actually use it until today when I was changing out the tires/wheels for brand new ones in preparation for sale. Darn, these emergency tire changing ramps make the job a piece of cake. I had all four changed in 15-20 minutes, including dealing with "interruptions". The best thing was that it came with the trailer from the previous owner.