NTW NL-PBK10-WH Locking RJ45 Port/Dust Blocker with Color Coded Keys Locking Port Blocker, a premier Layer 1 Security Solution tackles the security risks of open ports with the PortBlocker, a patented solution that secures from unauthorized port access and security breaches The innovative design of the PortBlocker surpasses the conventional "one size (or key) fits all" design of its competitors and offers four unique, flush mounted and proprietary locks and keys for unparalleled security. Locks unused RJ45 ports Secures against unauthorized access Keys are color coded individually to each color