Using the Klein T1715 ratcheting crimper is easy. First, identify the wire size you're working with and match it to the corresponding color - coded cavity on the crimper. Then, place the insulated terminal and wire into the correct cavity. Squeeze the handles firmly. Thanks to the full - cycle ratcheting mechanism, each squeeze will give you a strong crimp. When using it, make sure the wire and terminal are properly seated in the cavity to get a good crimp. After use, wipe the crimper clean with a dry cloth to keep it in good condition. Store it in a dry place to prevent rust. If you notice any issues with the ratcheting or crimping power, it might be time to have it checked by a professional.