This replacement pressure washer trigger gun only works for Karcher electric pressure washer with quick-connect system. If your pressure washer hose has the C-clip then it won’t be compatible. The trigger gun is an ideal alternative to replace Karcher new style quick release trigger gun, such as G 145Q, G 180Q, G 120Q and G 120Q Full Control. Note: It cannot replace the old model G 160 with the black C-clip. Please make sure that your pressure washer hose has a quick-connect fitting instead of C-clip connection. The high pressure washer trigger gun uses a bayonet connection to connect to all Karcher accessories and a quick connection for the high pressure hose. Equipped a childproof safety lock, it prevents you from injuries when misused, and with this fantastic trigger gun, it can help you achieve the best results for your home.