https://finance.yahoo.com/news/samsung-galaxy-fold-hands-on-142520176.html

My first thought when I opened the Galaxy Fold was "Please don't break this thing." After all, it's a nearly $2,000 smartphone. But the actual hinge mechanism that Samsung has developed for the Fold helps ensure you won't open it up so hard so as to break the handset in half. There's a satisfying "thunk" when you open the Fold up to expose its 7.3-inch touch screen display, and an even more pleasing clap when you snap it shut.

Samsung says the hinge and the screen's seam are guaranteed to open and close 200,000 times without seeing an issue with either. To put that in perspective, you'd have to open and close your Fold 100 times a day for 5 years to hit that number. And chances are you're not going to open up the Fold every time you want to check out a notification or answer a text message.