After winds snapped two (what I thought were) decent quality adjustable angle flagpole brackets from an online store (whose name is a South American river)in less than 3 months, I started shopping for a super duty bracket. I expect the screws will be yanked from the wood porch column before any damage occurs to the bracket.
This Multi angle fabricated flagpole holder should hold a flag in gale force winds without worrying about the pole and flag flying lose and doing damage. It is industrial strength.
heavy duty