【Note】 ●Do not use in places where the connection fittings may be subject to shock or get caught in something (e.g. steps on the floor, seams of checkered steel plates, etc.). Doing so may cause an unexpected accident such as "the connecting metal fitting jumps out". ●Separate the connection fitting while holding it with your hand. ● After connecting the connection metal fittings, lightly pull them from both sides to make sure that the metal fittings do not come off. ●Please use the coupling for exclusive use of the blade hose. Using other couplings may damage the hose.