Hello! I bought this fan to help keep me cool at work. (I work at UPS, loading trailers)
It honestly helps a ton, and I've had to replace the j-hook many times over the couple of years I've been using it. Realized that I've never posted it, so here it is!

Pictured 3rd is a 40oz bottle filled with water, showing that the hook is strong enough to hold the fan, plus a little weight on top of that. (It's actually where I store my water bottle while I'm working, so I don't accidentally lose it)

Installation help:
Make sure to use a dull object to push out the old pin. Such as a hex-headed screwdriver bit, or allen key. One end of the pin will have knurling. Push that end out first, and the rest should just fall out.