First of all, I‘d like to say how happy I am with how well these were packaged. They showed up in good shape and undamaged, and all the parts I needed were still in the box. They were easy to assemble and set up to use because the instructions were clear and simple, which is a bonus if you know what I mean, and I‘m sure you do, even for something like this. Simple instructions are important. There were no sharp edges. All the pieces fit together like they were supposed to, and once you have them installed underneath the car, they roll real smooth. It‘s easy to move it around back and forth. I‘m very pleased. Excellent value for the money. Good job, people. They‘re nice and sturdy metals, nice and strong. Very happy.