If you are owner operator like me, and want to save a few bucks on changing your brakes. There you go, that's how I change my brakes. And you can do it too. Just believe in your self, and check it out how easy it is. In the shop to change brakes on 4 wheels cost 600-800 bucks if not more. Here I changed 3 wheels spent for parts some 200 bucks. And probably would be 250-260 if I needed all 4. That's with core pads returned. You can return them later just keep the receipt. I'm buying parts in Fleet Pride. Probably cheapest parts for big trucks out there.