These adapters are the simplest of prefabricated sheet metals with threaded holes. They are not elegant, just functional. Screws are included. The quality and workmanship of the parts is fine, they are individually wrapped in plastic and then both in a small box. The only odd thing about these parts is that all of the threaded holes are for the smaller drive bolts used with 2-1/2" drives. Usually the bolts on the outboard flange are for a larger bolt, like a 3-1/2" "drive, threaded. So the screw heads are a bit smaller, which wasn't a problem for me.
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