Boost your physical network security starting at the port. Here's one of the simplest and inexpensive, yet most effective ways you can increase your Layer 1 security. Lock up your network ports with Series 3 Lockable Patch Cables and Key Locking Pins. If someone can't disconnect your network cable connections-either intentionally or accidentally-they can't tamper with and bring down your network. The Key Locking Pins feature a specially designed clip, which can't be released without this special Removal Tool. To unlock the cable, simply insert the tool in the clip.