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Can't speak for the claims that these work on Xbox etc, but these absolutely fit perfectly on the PS4 Dualshock 4.
The thumbsticks on my had controller had started to fall apart and rather than blow £40 on a new controller or try to take the thing apart to replace the thumbsticks (there are videos but it's not for the faint of heart) I bought these.
They are a little fiddly to fit - you have to turn them inside then pull them about over the stick until they fit. But once in place, they don't seem to move and the textured surface feels quite good in the hand. Gives your controller a new lease of life.
A little tricky to fit until you get used to it but they have stayed in place for me. These have helped playing golf games that require fine control of the analogue joysticks. Fingers no longer slip off joystick due to improved top profile and added friction.