There is a small curve in the holder. It also comes with a piece that would allow a flat mount for like a bird house. I imagine that is what they are talking about when they refer to a wooden block. No wooden block is included.
Yes in increments by removing a pole piece.
hi, yes it can.
The shortest "pole" in the photo is a plastic sleeve you put in the ground first and the extension pole is inserted into this sleeve.
Yes and screws came with the bracket.
6 feet high after installing per instructions. Of course feeder will hang lower.
My feeder only weighs a couple of pounds, so I have no problem. I estimate you could put no more than 10 pounds on the hook - remember the arm is only thick plastic.
1 inch wide 3 inch round, it comes with a cylinder that you put in the ground to slide the pole in.
Diameter is roughly 1 inch, but the metal pole is very sturdy.