Powerbuilt floor jack Purchased the 2 floor jacks not even a week apart When I lowered the car for the first time, it basically came down like a rock. Had zero reaction time to stop the fall and the result was it damaged my carbon fiber side skirt on the car. Called XYZ Company and they explained to me I torqued the handle too much which will allow the jack to release the cylinder and cause the car to drop fast. Was told to lightly twist the handle and not over torque it. He mentioned that was probably the issue and there is a rebuild kit available under warranty. Also told him about my damage to the side skirt and that would be addressed in a claim. But first things first, I told him I would try his method. And get back to him with the results. So I did, 25 +- times. Both jacks. Granted if a lightly twisted the handle the jack(s) would lower slowly but I was not able to consistently obtain the right twist on the handle to be able to lower (my Jeep) in a controlled manor. I have been using floor jacks for 40 plus years, mine and others and never had any issues with lowering the vehicle in a controlled manor. Basically, I am not able to use either jack as they BOTH experience the same trait. If I had only purchased one jack I would say it’s a manufacturing defect. Since I have two, its design flaw or substandard part that renders the jacks unusable. If I could rate with a zero star, I would !!!