The basics Used to release your Iwata airbrush from an air hose equipped with with the Iwata QuickFit Air Hose Adaptor (sold with the Iwata QuickFit Quick Disconnect Set). The benefits The QuickFit Air Hose Adaptor screws onto the air hose and stops the flow of air until the QuickFit Airbrush Adaptor, screwed onto the airbrush, is clicked into place. The uses Simply push down on the QuickFit Air Hose Adaptor to release the airbrush.