Alfaro shares with an interest for the introduction of industrial materials and an exploration of their formal potential. He strives after maximum order with the minimum of elements and invites the spectator to take an active part in the work, conferring it with movement. Using repetitive metal bars, Alfaro creates a new language in which form triumphs over matter.

In 1972 he developed a body of sculptures called Generatrices to which this work belongs.

It consists of a series of many stainless steel or aluminium rods or tubes, organised around a centre and arranged and moved by the change of the generatrix in such as way that the forms cross each other and change depending on the viewpoint of the beholder and of the light. The process provides great versatility by granting the possibility of creating large-scale sculptures, ideal for urban spaces.

Alfaro drew inspiration for these works from Alexandr Rodchenko (1891-1956) and Naum Gabo (1890-1977) although unlike those two artists, he endowed his sculptures with a meaning that transcends their immediate abstract appearance.