Right angle filter adaptor

The threaded tube that the filter screws on to just simply screws out. The adapter bolt screws in no problem. Some of the threaded tubes are removed with an allen wrench or was it a 3/8 square, like a 3/8 ratchet extension for example. I'm having memory laspse right now. And like moparmatt said don't forget the gaskets, there are three gaskets in the adapter kits.
Bob