The Wagner Control Spray uses HVLP (High Volume Low Pressure) air power technology to spray thin materials such as stains, sealers, urethanes, varnishes and lacquers. It features an outdoor rated air turbine for a continuous flow of material and air producing a professional fine finish whether staining your deck or refinishing your lawn furniture. A three position air cap adjusts the spray pattern for either vertical fan, horizontal fan or round pattern shapes to most effectively get the job done quickly and with the best even coverage. Material flow is easily controlled with the variable trigger allowing the user to spray 1/2 in. wide to 6 in. wide patterns.