The piece is trying to stage a singular object in the universe of the musician : the metronome. This "unit" of measurement usually accompanies the composer and performer in their stage of development and learning of a work and then it disappears at the time of the concert, giving way to an inaudible pulse and fluctuating.
In this music, on the contrary, the metronome is shown (small engine hitting the surfaces of the drums), imposing the mechanics of both static and fragile.
The music reveals itself as a construction game between man and the little mechanical arm...