This set of exterior case buttons includes the Power/Lock Button, Volume Buttons, and the Vibrate/Ring Switch for replacing buttons with cosmetic troubles.
These are the button parts visible on the outside of the case.
The actual buttons and switch that do all the work are attached to the Audio Control or Power Button Cable. If you are experiencing issues with your buttons not working it may actually be theAudio ControlorPower Button Cablethat's bad.