Open the basin wrench as wide as it will go. Lift the basin wrench up to the nut holding the kitchen faucet in place.
Close the basin wrench jaws around the nut. Turn the handle to the left to loosen the nut until you can unscrew it the rest of the way with your hand.
Loosen any other nuts holding the faucet in place, using the basin wrench. Some faucets have just one, some have three. Remove the nuts, then pull the faucet out of the holes in the sink.