Using this crimping tool is quite simple. First, select the right crimp pin for your connector. Then, strip the end of the 16 - 28 AWG wire. Place the wire into the crimp pin and insert them into the crimping die of the tool. Squeeze the tool until the ratcheting action locks and releases, ensuring a proper crimp. When using, make sure the wire is fully inserted into the crimp pin. Don't try to crimp wires that are outside the 16 - 28 AWG range as it may damage the tool. After use, keep the tool clean and dry. You can use a dry cloth to wipe it. Store it in a cool and dry place to prevent rust and damage.