Would depend on the screws, but it holds a hand towel without any difficulty
I had to return mine as they didn’t match going the same way on 2 opposite walls.
6 13/16" according to the Pfister web site.
Do you have the pressed metal spring or do you have the cast metal piece with the ball at the bottom? If you have the cast metal spring as your attachment point, you should consider returning it as the design of that will NEVER allow you to appropriately tighten it. It is literally attached to a spring and will always have give. There is a Moen design that is extremely similar that you might consider as well. In short, you have to find something that is a solid attachment point and not the spring. Another consideration would be to try to replace whatever attachment you're using with 1/8" toggle bolts. You can tighten those down, but if you have the spingy attachment, even that won't help.
Polished Chrome according to the Pfister web sit
Yep, good observation. In theory the Quick Clip is a reasonable idea however the engineering design is awful. There is absolutely no tolerance. If the Quick Clip is not installed absolutely perfectly the first time, it will either not engage correctly or the base will not be pulled tightly against the wall, thus the wobble. Tough to fix bad engineering.
Yes. According to the Pfister web site, it comes in bronze.
I suppose it depend on how well it's mounted. It is a fairly easy process.
It can be installed on an opposite wall, but cannot be "reverse mounted". The open part of the ring is always on the right.
Yes. It works as a toilet paper holder. That's how I'm using it.