Karcher's patented Dirtblaster™ nozzle provides large area coverage with almost the same cleaning power as a solid pencil jet! This is achieved by a high-pressure pencil jet rotating at approximately 4,000 RPM, which increases the effective cleaning pressure of your pressure washer by up to 50%! Unsurpassed at removing stubborn dirt and solvents! (Warning: Not recommended for delicate or painted surfaces). Includes pre-assembled Quick Connect adapter. Fits Karcher gasoline pressure washers with a rating of 2400-2500 PSI. Replaces Karcher Original Part -9123001 (9.123-001.0), 2640854 (2.640-854.0)