These cases are perfect for my PS4 controller joysticks. Another reviewer said that the original rubber needs to be removed first, but I just put it on top of the originals and it gives me the extra height as well as the improved gripping surface of the Fosmon grip. They're hard to put on, but just press the sides and they fit nice and snug. I immediately found that following leaping guardians in a Crucible (Destiny 2) and getting more headshots made me better at staying on target.