Bring your old controller back to life. This first aid kit fixes two basic problems. It fixes the problem with "dead buttons" by replacing the rubber pads that the buttons rest on. After several years of heavy gaming, these pads can wear out and not provide the "spring" back that they once did. Replacing the rubber mats is easy and requires very basic skill. This kit also includes two replacement thumbstick assemblies. This includes the mechanism for the thumbsticks plus the potentiometers that work with the mechanism. Replacing the thumbstick mechanisms requires intermediate soldering skills.