The core activity of A.D. GRU is the sale, rental and maintenance of construction machinery and equipment, particularly: construction cranes, telescopic handlers, assembly cranes, scaffolding and formwork, concrete pumps and mixing plants, and prefabricated boxes and buildings. The company also offers transportation services for these machines and equipment, with its own fleet of trucks and semi-trailers. Additionally, A.D. GRU provides technical assistance and maintenance for the machines and equipment sold or rented by them.