I was having bad stick drift on my PS4 controller so I tried everything from recalibrating to resetting the controllers . Nothing worked, so I found out little white discs in joysticks go bad. So I ordered them, took out the white discs and installed them in my controller. And now my controllers work like new again. The tools were also very useful and of good quality. I just wish the screwdriver was a bit longer as I have big hands.