I bought this set about a month ago just to try it out. I got the opportunity last weekend when I had a flat tire on my 7,000 lb dual axe trailer with a 5,000 lb tractor on top of the trailer. My son and Son-in-law went to work with the jack from the kit. We were all impressed when it picked up the trailer with ease, even with the tractor still on it. The real deal was the electric wrench popping loose the tourqeted lug nuts. My son said," I know what I want for Christmas! " So, I ordered two more sets! I highly recommend this set!