This piece of garbage I bought 4. The first one the screw keep rotate in the same place, the 2nd and 3rd not balanced AT ALL. I stopped and asked for return. They send another pack. All the other pack not balanced with huge leg differences and the one of them 2 of the main screws rotate in the same place. IT IS A HUGE RIPOFF. Don’t buy or waste your money on this . I want a refund for wasting my time and energy and for all the stress.