These compressor accessories allow you to quickly fasten attachments to your air compressor and make safe quick disconnections if necessary. This set of quick couplers includes a 1/4" female industrial style quick coupler, a 1/4" female industrial style plug, two 1/4" male industrial style plugs and a brass male connector to fit onto any 1/4” NPT tool. Each piece is made of corrosion resistant brass or steel. Get the most of your air compressor with these outstanding quick couplers!