Forney 75156 Pressure Washer Accessories, Quick Connect Spray Nozzle, Wash, 40-Degree-by-4.5mm, White Quick coupler plugs are used in combination with the 1/4-Inch quick couplers Used anywhere high pressure connections are frequently assembled and disassembled Ideal for quick exchange of spray nozzles and spray guns These quick couplers plugs connect to all of the most common pressure washer equipment in the industry