I like their durability and they roll a little better than other products I've used. I am using these on my 64 Thunderbird which I am currently repairing and after that I will be using them on my 64 Mustang. That's good because I can move the car myself and now it doesn't move; so it's very important that I can move it. I'll probably buy another set so I can work on two different cars and free up garage space by just flipping one.