A: Thank you. You cannot switch the direction.
A: Thank you. This can be installed in wood as well as drywall.
A: We attached it to our new glacier bay vanity no problem. It was just like drilling into wood.
A: Thank you. It does not roll but it does move so that you can put on a roll.
A: Thank you. All measurements that are available can be found on the specification sheet located in the "Info and Guides" section.