Kit of parts for mechanically coupling a ceramic element to a rod comprising an outer surface made of metal, wherein: (a) the ceramic element comprises a cylindrical ceramic bore defined by a cylindrical bore wall and extending along a longitudinal axis, X1, wherein the cylindrical bore wall comprises at least one recess, and wherein the rod comprises: (b) an outer tube comprising a jutting portion adjacent to an insert portion, and further comprising: • an outer tube wall made of metal and defining the outer surface of the rod, wherein a portion of the outer tube wall of the insert portion is cylindrical, extending along a tube axis from a proximal end of the jutting portion to a distal end of the insert portion, and having a radius, R8, mating the cylindrical ceramic bore, • an outer tube bore, preferably comprising a cylindrical portion of radius, R8b, said outer tube bore extending along the tube axis from the proximal end and over a whole length of the jutting portion and further extending over at least part of a length of the insert portion, (c) At least one projecting member (7b, 7p) comprising a projecting portion having a geometry insertable into the at least one recess of the ceramic element, (d) An inner mandrel extending along an axis and having radial dimensions suitable for being inserted into the outer tube bore, and preferably comprising a cylindrical portion of radius, R5 ≤ R8b, wherein (e) The insert portion of the outer tube can be inserted into the ceramic bore with the projecting portion of the at least one projecting member engaged in the at least one recess, and with the jutting portion jutting out of the ceramic element, and wherein (f) The inner mandrel can be inserted into the outer tube bore from the proximal end of the outer tube, such that the projecting portion of the at least one projecting member is resiliently stabilized in the at least one recess by a stabilizing portion of said inner mandrel, and the rod is thus mechanically coupled to the ceramic element in that the outer tube cannot translate along the longitudinal axis, X1, with respect to the ceramic bore, characterized in that the stabilizing portion of said inner mandrel is radially resilient, such that the at least one projecting member (7b, 7p) can be dislodged from the at least one recess upon application onto the outer tube of a force greater than a predetermined threshold force required for decoupling the metal rod from the ceramic element. (a) the ceramic element comprises a cylindrical ceramic bore defined by a cylindrical bore wall and extending along a longitudinal axis, X1, wherein the cylindrical bore wall comprises at least one recess, (b) an outer tube comprising a jutting portion adjacent to an insert portion, and further comprising: • an outer tube wall made of metal and defining the outer surface of the rod, wherein a portion of the outer tube wall of the insert portion is cylindrical, extending along a tube axis from a proximal end of the jutting portion to a distal end of the insert portion, and having a radius, R8, mating the cylindrical ceramic bore, • an outer tube bore, preferably comprising a cylindrical portion of radius, R8b, said outer tube bore extending along the tube axis from the proximal end and over a whole length of the jutting portion and further extending over at least part of a length of the insert portion, • an outer tube wall made of metal and defining the outer surface of the rod, wherein a portion of the outer tube wall of the insert portion is cylindrical, extending along a tube axis from a proximal end of the jutting portion to a distal end of the insert portion, and having a radius, R8, mating the cylindrical ceramic bore, • an outer tube bore, preferably comprising a cylindrical portion of radius, R8b, said outer tube bore extending along the tube axis from the proximal end and over a whole length of the jutting portion and further extending over at least part of a length of the insert portion, (c) At least one projecting member (7b, 7p) comprising a projecting portion having a geometry insertable into the at least one recess of the ceramic element, (d) An inner mandrel extending along an axis and having radial dimensions suitable for being inserted into the outer tube bore, and preferably comprising a cylindrical portion of radius, R5 ≤ R8b, wherein (e) The insert portion of the outer tube can be inserted into the ceramic bore with the projecting portion of the at least one projecting member engaged in the at least one recess, and with the jutting portion jutting out of the ceramic element, and wherein (f) The inner mandrel can be inserted into the outer tube bore from the proximal end of the outer tube, such that the projecting portion of the at least one projecting member is resiliently stabilized in the at least one recess by a stabilizing portion of said inner mandrel, and the rod is thus mechanically coupled to the ceramic element in that the outer tube cannot translate along the longitudinal axis, X1, with respect to the ceramic bore, characterized in that the stabilizing portion of said inner mandrel is radially resilient, such that the at least one projecting member (7b, 7p) can be dislodged from the at least one recess upon application onto the outer tube of a force greater than a predetermined threshold force required for decoupling the metal rod from the ceramic element.