Quick connect and disconnect for fast air tool changes with reduced wear on threaded fittings. For use with all 3/8-in. automotive and universal quick-connect couplers and plugs. Contents: 2 Quick-connect couplers with 3/8-In. NPThreads, 2 Male 1/4-In. NPT threaded plugs, 2 female 1/4-In. NPT threaded plugs, 3/8-In. NPT male threaded plug, 3/8-In. NPTfemale threaded plug.