These thumbsticks are designed for Xbox One gamers who want to enhance their gaming experience. They're perfect for replacing worn or damaged thumbsticks on your controller. The concave design provides a better grip, making it easier to play for longer periods. They're made of durable rubber and fit Official Xbox One controllers without any modification. You'll need a Torx T8 & T6 security screwdriver (not included) to install them. Keep in mind that opening the controller to install may void your warranty.