Bonetto was a self-taught designer with a love of jazz and playing the drums. He expressed his style in a countless number of objects, including machine tools, household appliances, alarm clocks, telephones, calculators, ski boots and surgical lasers. One of his particular fields of interest was the design of automobile interiors, where he combined the stylistic continuity of material and form with ergonomic and technical requirements. That approach contained elements of design theory as it was taught at Ulm, which are also recognisable in the Polo handle.
Its geometry is based on the modulation of a single oval section. As the handle bends by 90 degrees, it gives body to the image of the lever.
The formal matrix is an oval with almost the same diameter as the rose. The strict geometric outline is transformed by adapting to the gesture of the hand as it grips, breaking the formal symmetry and generating an imperceptibly offset shape that respects the rules of ergonomics.
