EMPIR Capacity Building project Traceability Routes for Magnetic Measurements (TRaMM, 21SCP02) is a training project, where INRIM, the NMI for Italy, is transferring knowledge and expertise in the field of magnetic measurements and calibrations to CEM and NSAI, the NMIs for Spain and Ireland respectively. This will extend the European capabilities for measurements in this technical area, where currently only four NMIs have the ability to perform traceable measurements of all of the most important magnetic quantities.