Uses water flow from a karcher pressure washer to gently spin a set inner brushes for more effortless cleaning * Perfect for cleaning painted surfaces, such as vehicles and boats and other flat surfaces including window panes and stucco * Ideal for dispensing pressure washer detergent: supply karcher pressure washer with detergent and attach the rotating wash brush to the trigger gun * The best companion for your karcher pressure washer while cleaning your vehicle or home siding * Compatible with all karcher consumer electric pressure washers