Connection of Gun is Quick ConnectorYou can click quickly in and out of the trigger gun, saving you time and effort. Kindly Reminder: There should be a yellow button(not black) on the trigger gun and you release the hose by pressing this button. | Connection of Pressure Washer is SCREW THREAD ConnectionThis high-pressure hose can only be connected to Karcher consumer pressure washers with an M22 connection. Kindly Reminder: The M22 connection should be SCREW THREAD. | Highest QualityNon-kink, durable, weather and abrasion resistant. |