The Simpson pressure washer surface cleaner is used for cleaning driveways, patios, decks, sidewalks and more. Its 15″ diameter provides 10x more coverage to clean more efficiently for big jobs. For use with cold water pressure washer with ratings between a recommended minimum 2220 PSI and maximum 3700 PSI, the 80165 surface cleaner has two high-pressure, rotating jets to help remove dirt and grime from surfaces with 10X more coverage than a standard nozzle. This surface scrubber features high-quality steel attachments and utilizes high-pressure rotating jets for a thorough clean that is fast and streak-free. The powder coated steel shroud prevents overspray, allowing the user and surrounding areas to stay dryer when compared to a pressure washing wand.