The Cono’s profile was a sculptural reproduction of the diagram of forces involved in operating the handle, and thicknesses were reduced to a minimum. Its main characteristic is the shape of the rose around which the handle rotates: it is a continuation of the shaft. This results in an aesthetic unity that required particular skill from the cabinetmaker installing them.
— Gio Ponti
The Cono handle was used for his spectacular Villa Planchart (1953-1957) in Caracas, Venezuela.