Oetiker Swing Couplings eliminate common hazards associated with connecting and disconnecting standard pneumatic couplings and quick-disconnects, including the hose whiplash effect that commonly occurs when disconnecting a coupler or quick-disconnect. Two-stage operation of the swing coupling eliminates possibility of hose whip. No force is needed to connect the coupling to an air line, even on lines with 200 psi. The user simply inserts the plug and swings it to connect. Installation of couplings with inherent safety features can greatly reduce the risks commonly associated with connection and disconnection of pneumatic fittings and quick-disconnects.