Avoid loose connection problems from punchdown keystones by using the Platinum Tools Cat 6 Shielded Keystone Coupler in your installation. Simply terminate your Cat 6 twisted pair cable with an RJ45 connector, then plug it into the back of this shielded female-to-female Keystone Coupler. Finally, snap the Keystone Coupler into your standard wall plate, surface-mount box, or unloaded patch panel for secure and reliable connections. A single Keystone Coupler is included in this bag.