Garden hose couplings (often also called "GEKA coupling") made of brass or stainless steel are used to couple water hoses quickly and economically. They are symmetrical, non-shut-off couplings with 40 mm claw distance (Caution: Risk of getting mixed up with the compressor coupling with 42 mm claw distance!), which are coupled by twisting the claws with each other. A differentiation is not made between plug and sleeve. As the coupling has no shut-off function, it must be ensured that before coupling the line has no pressure. The danger of decoupling under pressure is reduced with a safety coupling: when decoupling first the seal is turned back (pressure relief) and then the claws are twisted against each other.