[Vern B]

I bought two of the cheap one's from Northern Hydraulics in Minnesota and they work fine the way I use them. I drive the front of the car as close to a wall as I can get it, jack up the rear, slip them under the rear wheels and push tight to the wall. I've used them on small cars and up to a 65 T-Bird and they work fine. Have not tried using them on all four wheels. They have held up for 7 or 8 years with no problems.