The trigger gun is an ideal replacement for Karcher pressure washers that used the original gun. This spray gun uses a bayonet fitting to connect to the spray nozzle and a quick-release coupling for the high-pressure hose. Compatible with Karcher K3-K7 series pressure washers, but not suitable for K1700-K2000 electric pressure washers, gas pressure washers, or other brands of pressure washers. Equipped with a child-proof safety lock, it prevents injury from improper use. With bayonet fittings and a pressure of 150 bar, it is suitable for commercial and domestic use thanks to its durable exterior.