These heavy duty 2 prong female plug ends (AKA outlets, receptacles, or connectors) are perfect for wiring up 2-wire electrical cords into an extension cord style setup (or replacing existing connectors). They look great with our 3-wire round cords too, although since they are only 2-prong there will be no ground connection. Look great, high quality, easy to work with! Pair with our matching male 2-prong plugs to make an extension cord setup! When making extension cords, be sure to always keep in mind the limits of the cord you are using, as well as the plugs!