new design of the shower nozzle

For the disc type shower nozzles, normally they're designed to be installed with locking nuts, while there's a problem that after working for a certain period, the nozzles were sticked to the bases with the gaskets that difficult to remove. Now there's a new design to make them one-piece construction, say produce the nozzles with threads, now you can remove the nozzles very easily, just with a wrench.