projections 6 a 6 b extend respectively by 90 u00b0 around the journal 4 respectively one journal flank 7 a 7 b is designed between the journal projections 6 a 6 b furthermore a journal groove 8 is designed between the journal projections 6 a 6 b and the contact surface 5 each journal projection 6 a 6 b has a contact surface 9 a 9 b pointing in the direction of the contact surface 5 and designed as part of the journal groove 8 the contact surfaces 9 a 9 b are designed to engage with an undercut arranged on the riveting tool receptacle 2 and designed as bolts 10 a 10 b a thread 11 is arranged below the journal projections 9 a 9 b i e in the journal longitudinal axial direction 4 a shown here as a dashed line and on the side of the journal projections 9 a 9 b lying opposite the contact surfaces 9 a 9 b the thread 11 is optional and designed for attachment of the riveting die 1 to riveting tool receptacles known from the state of the art furthermore two tool magnets 12 a 12 b which are indicated by dashed lines are arranged in the riveting die 1 the tool magnets 12 a 12 b are also arranged diametrically around the journal longitudinal axis 4 a the tool magnets 12 a 12 b are positioned parallel to the journal flanks 7 a 7 b embedded in.