In operation, the RTTL test tool quickly pre-loads the contact with the test force and then releases if the contact is properly seated. The RTTL is held in alignment with the connector, with the probe touching the contact to be tested. The tool is then pushed towards the connector. If the contact is properly assembled and locked in, the tool gives an audible and physical “click” when the preset load pressure is reached. Immediately following, the wing stop on the face of the tool bottoms out on the rim of the connector shell and leaves the contact unharmed and intact. If the contact latching clip is faulty or the contact was not inserted properly, the tool will automatically bottom out on the connector shell and at the same time, force the contact partially out of the connector, giving the user a good visual indication of the faulty contact. During this cycle, no “click” will be felt or heard as the pre-load has not been reached.