These are designed to use a 5 gallon bucket inside keeping them from rotting out from direct contact with soil. It also makes them easy to move if you like.
Three different bracket styles:
Straight out with 45° brace(hanging lantern style)
Straight out no brace(for 12" x 18" common banner flag)
Upward slant with brace( good for wind chimes and longer hanging items)
Hanging brackets can be installed on the 45(as pictured) or square off of either side.