The #85.403.010 Whirlaway cleans flat surfaces such as patios, driveways and pavements quickly, easily, and evenly when coupled with a high powered pressure washer. A commercial grade accessory, when used along with a power washer, to clean large flat surfaces such as long driveways or industrial properties. A rugged machine, set on sturdy wheels and castors, it features a hover action, which is ideal for cleaning aggregate, stamped concrete and other flat surfaces. This flat surface cleaner prevents what is sometimes known as zebra striping or streaking, and increases your cleaning time by up to sixty percent over a regular nozzle. This model has water flow out the front away from the user and zero wall clearance cleaning