pin punch 26 as illustrated in fig2 or a pin pusher 27 as illustrated in fig3 as it is apparent from fig1 a the body 1 has a front face 9 which is rectangular in the embodiment illustrated and which has a groove 8 at its upper part extending through the side 7 of the u shaped housing the groove 8 is aligned with the axis of the above mentioned housing 25 furthermore the body 1 as illustrated here carries on its face which is at the opposite of the face 9 an abutment component part 24 running parallel to the axis of the housing 25 and designed for co operating with said portion 30 for catching hold of a pin partly expelled from its housing fig2 is a schematic cross sectional view of a pin punch 26 designed for the combined tool described above this pin punch has a hollow cylinder 10 of which the outer diameter is very slightly smaller than that of the housing 25 so that it may be introduced therein an end 13 of the cylinder 10 is preferably of a conical shape so that it may be placed as close as possible to the pin which is to be expelled so as to limit the risk of buckling of the needle 12 the cylinder 10 has an axial bore which extends over its whole length and in which is guided slidably a rod 11 carrying the needle 12 at.