The Polivac PPR137 4″ Upholstery Tool is a premium attachment crafted for precise cleaning in small areas, from upholstery surfaces to automotive detailing. It features a built-in viewing window to monitor cleaning performance and a vacuum release mechanism for seamless control during use. Its external spray nozzle-protected by a guard-ensures targeted and clean solution application without overspray, making it ideal for professional and detailed cleaning tasks.