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