Corrosion proof HKD metal multiple disc couplings compensate a parallel misalignment up to ±0.5 mm and an axial misalignment up to ±1.5 mm as well as extending the service life of encoders in the process. The double joint couplings are available with different hub lengths and bore diameters in addition to insulated coupling versions for attachments, where the risk of shaft currents is a concern.