How to use SN58B? Step1: Place the terminal into thesuitable jaw slot Step2: Strip the wire and place it into the terminalcrimp it until the pin is fully in the gap Step3: Close the tool slightly until the ratchet just engages and grasps the connector. Step4: Squeeze the ratchet and it will open after this step. Connector should have successfully crimped on to the wire. | Nordara 0.25-1.5mm² Ratchet Crimper Plier Cable Wire Crimping Tool in Black