The SMARTguard is a guard tailored to the head of a tonearm and thus it works with ALL cartridges, yet is exclusive to be used with the Arche headshells and the tonearms of Acoustical Systems.
Made out of 3 and 6 mm GS-acrylic.
The UNI-DIN Protractor is a specialized protractor for different alignment curves. You may put the correct data-sheet of the used tonearm into the UNI-DIN Protractor as well as an UNI-DIN scale.
UNI-DIN is designed for 12 inch stereo records only and provides better conditions of the today´s analog music world.