This connector is screwed into the end of your air hose and by simply sliding the spring loaded sleeve back, the airbrush is disconnected.

Note that this item is self sealing when disconnected, preventing the need to remove air pressure from the hose before changing air tools. 

The quick release tail that comes with this kit is a 1/8bsp female and will connect to all Iwata, Harder & Steenbeck, AB-Series airbrushes and well as the DeVilbiss DAGR.