Duesenberg Radiator Tremola - NickelDescription A gold standard for function and design The Duesenberg Radiator Tremola. With a focus on elegant design, the Radiator Tremola brings you typical Duesenberg quality and reliability as in all our hardware. The tremolo arm can be turned freely for 360, allows you to set your preferred angle and can be removed within seconds just in case you don't need it sometimes. The strings are simply guided through the holes in the bar underneath the arm