This item is used on multiple models.
Can be substituted with the newer China part 36-115L2 which is secured by the 69B-4400 C-clip, if you prefer not to have to peen the button on.
Both buttons work with the 35-115 tongue.
To replace the click tongue and button on models where it is peened into place, use a dremel drill with a fine tip to remove the old click tongue and click button. Then peen the new ones into place. Peening is when you gently tap the end of the click button with a small hammer until the metal spreads out enough to hold the click tongue in place.