Cat5e Toolless Jack Black Keystone Insert, RJ45 Female. Our black Cat5e keystone inserts are used to terminate network cable runs. They offer a clean transition using a tool-less punch down to a Cat5e jack for easy deployment in any environment. From the server room/closet to any room in your home or office where network connectivity is desired these keystones are a great option. These Cat5e keystones work with any of our keystone wall plates, surface mount boxes and keystone patch panels and offer you a highly adaptable modular design. The punch down side requires you line up the wires and compress the plastic cover to complete a tool-less installation. This particular keystone is black and UTP (Unshielded Twisted Pair). Pure copper conductors provide the best signal possible. The RJ45 jack features gold connectors to prevent corrosion thus ensuring a longer cable life. Our Cat5e keystones exceed the EIA/TIA-568-C standard.