Since some of the carboard spools had different diameters for the cardboard cutout the ring adapter didn't always work. This model allows you to rip the carboard side off and slide the spoon on top. Looking at the image uploaded you will see (left to right) cardboard adapter, replacement spool (this model), Creality RFID spool, replacement spool (this model).

This is designed to press fit and screw in after tearing off the cardboard. I recommend keeping the outer piece on the left side so that when filament is being pulled it puts stress in the direction of the screw (tightening it) instead of putting pressure against the screw which could potentially loosen the spool, I am not sure how much of a concern that is, but I think it is best to have it that was as a precaution.