Compatibility - Replacement old thumbsticks,the set is designed to be direct replacement of the original controller analog stick. These thumb sticks are made specifically to fit PS4 Dualshock 4 controllers,as well as Xbox One controllers The thumb Grips button makes your controller stand out from the crowed with a new,fresh look and unique stlying unlike any other. Quality - The thumbstick button is made of premium ABS meterial,wear-resistant and durable.Precision design,no modifications are needed,perfectly fit for your controller,give you the most complete game pleasures. Install - Requires technical internal fitting ,the controller must be opened to install. There are plenty of YouTube videos that will walk you through the process, cross screwdriver included help you open the shell very easily, then just replace the worn out or broken controller cap which will make your controller look awesome again.