I’ve just finally fettled my wipers today which were held on to the arms with 2 little screws. I’ve heated and bent the arms to fit nicely to the screen and went to change the wiper rubber as mine were old but actually discovered that when getting a 18” universal wiper of the shelf in the garage I could cut this in half to create to 9” blades and the Blade arm was slotted which actually lined up to the screw Holes in the main arm perfectly. Can take a photo tomorrow if needed.