This implement is supplied with Nitrogen gas.

In hydraulic rock breakers, nitrogen gas plays a crucial role in the hydraulic cycle, particularly in energy storage and pressure regulation. The gas is used in an accumulator, a chamber within the breaker, to store energy and ensure a consistent impact when the tool strikes the rock.
In essence, nitrogen gas acts as a spring or cushion, storing energy and ensuring a consistent and powerful hammering action when the rock breaker is used.