<p>If you are not 100% sure of which generation controller you have, we highly recommend you open your controller first to check the motherboard model before you purchase.</p><p><b>The L1 R1 button only fit for the first generation PS4 controller (Motherboard Model: JDM 001, 011, 020, 021). </b></p><p>There is a tip here might be helpful in case you don't have the tools: The 2nd generation controllers come with a very thin lightbar on top of the touchpad and most of the 1st generation controllers don't. </p><p><b>INSTALLATION GUIDES:</b></p><p>Designed for Sony PlayStation 4 controllers only. </p><p>Requires technical internal fitting, the modded PS4 controllers must be opened to install.</p><p>The tool required to replace the buttons is included in the package. </p><p><b>Watch installation video on Youtube will be helpful if you do not know how to install them, be careful and patience will avoid some unnecessary mistakes.</b></p><p><b>PACKAGE INCLUDES: </b></p><p>2 x Metal Joystick Thumb Sticks</p><p>4 x Metal ABXY Buttons</p><p>1 x Metal D-pad Button</p><p>1 x Phillips Cross Screwdriver</p><p>4pcs Philip's head screw</p><p><b>Notes: </b></p><p>The PS4 controller is not included.</p><p>Each item has been well tested before delivery, but we cannot 100% guarantee it won’t be defective because of transportation. Any problem, please feel free to contact us through Amazon Email System and we will do our best to solve it.</p>