The SIMPSON pressure washer surface cleaner is used for cleaning driveways, patios, decks, sidewalks and more. Its 20? diameter provides 10X more coverage to clean more efficiently for big jobs. For hot or cold water pressure washers with ratings between a recommended minimum 3450 PSI and maximum 4500 PSI, the 80182 surface cleaner has two high-pressure, rotating jets to help remove dirt and grime from surfaces with 10X more coverage than a standard nozzle. The powder-coated steel shroud and stainless steel nozzles provide protection against corrosion; the brass components and in-line filter provide durability. The powder-coated steel shroud prevents overspray, allowing the user and surrounding areas to stay dryer when compared to a pressure washing wand.