This will fit your Joysticks on your standard Xbox360 remote. I'm not sure if these will fit Xbox one or Normal Xbox remotes. Just snap on and off.
^ Dont forget to get two, one for each stick. and your other controllers
These Joystick extenders help with Aim in sniping, driving, looking, moving, flying, or anything you need faster movements sometimes and more precision other times.
This design uses a round top I have another that copies the concave like the original joystick on the Xbox remote.