THUMSTAX &ndash; The Multi-Stackable Thumbstick Extender for PS4 Multi-Stackable  Customise your controller to suit your play style and game type Smaller Thumbstick Head  Gives you more precision whilst allowing you to get to the buttons quickly Convex Thumbstick Head Shape  Reduces dead spot from your controller giving you more responsiveness Plastic Base  Both multi-stacks and grips the analog stick consistently and just the right amount Rubber Head  Soft textured grip design for confident and controlled gaming sessions