a tool for use with a full rotational freedom , substantially zero friction electrical contact assembly of the type disclosed in u . s . pat . no . 4 , 068 , 909 comprising a notched rod of a diameter less than the normal concentric gap between the conductor rings , for receiving conductor loops in hanging relation thereon , the rod being mounted in a support base which includes a guide means for radially and axially positioning the rod within a preassembly eccentric gap between the normally concentric conductor rings . upon closing the eccentric gap to its normal concentric relation , the loops are captured by the conductor rings and the notched rod is withdrawn .