What is a pneumatic couplings?

What is a pneumatic couplings?

The pneumatic couplings are used to connect compressed air tools to a compressed air line. 

The pneumatic couplings allows a tool to be easily connected or disconnected to a hose or pipe while it is under pressure.

The system consists of two parts: the quick coupling (the female part) and the plug-in or nipple (the male part).

The coupling closes the line automatically as soon as it is disconnected from a component ensuring the system stays pressurized.