It should if you use a wing nut. Unless you can find a stud then you can use a drill and then screw it in.. Either way it will work.
They just unscrew!
1/4" but just use a 1/8" drill bit and screw about 1 in. Then it will be easy to screw in.
up to 50lbs. You need to take into account if it is a plant you are hanging, the added weight when it is watered.
No wing nuts. Just screws in.
It is not.