For its clean lines and lean visual language, Gardella declared to have taken inspiration from the German functionalist architect Ferdinand Kramer, who had participated under the project leader Ernst May in the new city plan for Frankfurt (Das Neue Frankfurt, 1925-1930) by designing a utilitarian, geometric door handle.
. Gardella studied the proportions of his own handle by starting with a cylindrical element.
progressively widens toward the end of the lever, taking on a conical shape with the same elementary elegance that distinguishes his architecture.