Not to be used without out USB Port Blocker Key see QS: 007681
Pack of 10 USB Port blocks for use with the NLUSB-PB01 key, these port blocks can be inserted manually but can only be removed safely with the key.
Pack of 10 USB Port blocks Ideal for schools and colleges
Visit the Kenable Ltd website for more information on USB PC Laptop Secure Port A Type Blocker 10 Pack