This guy I swear is looking at my internet search history… The closers most popular around here are the sprung chains in a cylinder hidden in the hinge style. Not sure they have close/latch speed options though. I need to sort out my garage and stairs fire doors, as they are currently always held open by a fire extinguisher (for irony) and a stuffed dog respectively.

I wish he’d made this video 10 years ago when I had one of these doors right outside my apartment 😅