How does Apple repair products on the spot at the Genius Bar? They don’t. But behind the scenes are some clever tools that allow repairs to be made quickly and easily. Buster Heine:
Rather than use just a single suction cup and pry the display open, Apple created the Universal Display Removal Fixture to provide quicker access to the iPhone’s internals without putting components at risk in the process.
To open a device for repair Apple has mounted Universal Display Removal Fixtures with four suction cups to gently pry the display from the body