The Gardena Garden hose coupling facilitates fiddling with the garden hose. Sometimes you only need a shorter piece of hose to water plants, a garden shower or connect the rain barrel. So you do not always use the hose trolley and roll the whole long hose. Practically, it is also that you can connect all Gardena spray guns and other irrigation systems. I'm going to buy yet another clutch in order to have even more options with different hose lengths.
