I know exactly witch one you mean, I bought the red and silver aluminum jack from sears about 5 months ago, it was on sale and I had a craftsman card cupon. The jack works great, it is very light and pumps up just fine. I have used other aluminum jacks before that were awefull, they didn't lift anything heavy very good. They were always 2500 or 3000lb racing jacks, and their one pump lift is for the birds, might work on a light race car but not in the real world. The Sears jack is rated at 4000lbs, it has a one pump fast lift, but that just takes you up till it hits, then you can just jack it up at will. I still have my big shop jack, and I still use it, but I am getting more use to the aluminum one. Jacks are funny for me, I have to build up to trusting them.