How do they get the car to go up that second step?
Also - when you get the bar can you post a review of it?
I have the liftbars, and I think I understand your question.
If after getting the car on all 4 jack stands, you want additional height, you place your floor jack back under the bar and begin jacking until you reach the desired height (both sides alternating). When lowering the car, you will want to lower each side gradually until the car is at a safe height (not likely to tip over) before finally lowering to the ground. This is only necessary if the car is lifted quite high.
Not sure about my ability to write a review, but I will try.
I have used the bars 3 times and I'm very pleased with this solution. I feel safe climbing under the car. Lifting the car using liftbars requires a few more steps, but i really like the fact that the bars can be easily stored without taking up any space in my garage. I considered the other unique jack stands available, but liked this product best.
I experienced 2 annoyances that I had not considered before purchasing the liftbars.
1.) our 718 sits so low that you cannot place the bar on the floor jack and roll the bar under the car. So, I made 4 ramp pads (2'x12"x2" see images in my post above) using lumber to get the additional height needed.
2.) if the work you are doing on the car requires removing the floor pan, you will want to remove the pan before lifting the car because the liftbars cover the floor pan screws/nuts
The bars are quite heavy at roughly 15lbs. each and at roughly 5ft long, you need to be careful maneuvering them in close quarters. They are well made and nicely balanced. I'm not a welder, but the welds look really good (see my close up photos above). The buttons fit perfectly and securely into the openings at the jack points on our car. Once your car is perched on the bars/jack stands the setup is very stable. My garage floor is flat and level so no problems there.
My Harbor Freight 3 ton jack stands cradle the bars perfectly allowing the car to pivot as it is being lifted or lowered.
I believe the cost was just under $300 shipped using PayPal.
There are lots of positive comments on Rennlist.
BTW, I have no relationship of any kind to the manufacturer of the liftbars.