Neewer Crimping Crimp Plier for RJ45 RJ11 RJ12 Network Cables/Connector RJ45 RJ11 RJ12 Network Cable/Connector Plier Hard durable magnetic steel for mouth of the plier Will not damage cable and shelled wires While using press-pliers, just insert the crystal top into its position and press it Suitable for: RJ-45, RJ-11, RJ-12 connectors, Cat5, Cat5e cables with 8P8C, 6P6C, 4P4C plugs