There is a ratchet mechanism, so when you caulk the cable, it clicks when you caulk it properly.
In the case of a half-way caulk, the hand is fixed by the ratchet, so it is prevented from accidentally caulking many times and damaging the connector part.
Compatible with both single and horizontal wires
Compatible with RJ45 connectors (8 poles, 8 cores) and RJ11 connectors (6 poles, 4 cores)