From Karcher
Two-part adapter set for connecting an extension hose with screw thread to a pressure washer with a Quick Connect system. Not for hose reel machines. For upgrading all pressure washers manufactured since 1992 with Quick Connect adaptor system. Key Features Quick Connect upgrade set Brass coupling Quick Connect System Extremely user-friendly Compatible Machines K2 Compact K2 Compact Car & Home K2 Compact Home K2 Home K2 Premium Home K3 Premium Home K4 Compact K4 Compact Home K4 Full Control K4 Full Control Home K4 Premium Full Control Home K5 Compact Home K5 Full Control Home K5 Premium Full Control Home K7 Premium Full Control Home K4 K4 Home K4 Premium Ecologic Home K5 Car & Home K5 Premium Ecologic Home K7 Premium Ecologic Home