Physically blocks access to a USB Type C / Thunderbolt 3 Port Quick and simple to Use Includes 1 key and 4 Port Blockers Also available in packs of 10 (Without Key) 2 year warranty With the Lindy USB Type C / Thunderbolt 3 Port Blocker, you can quickly block open ports and easily prevent users from connecting cables, devices or inserting foreign objects without permission. The USB Port Blocker is made up of a combined ‘key’ and ‘lock’ assembly which plugs into the USB port. To use, simply plug the ‘keylock’ into the port and release the latch – the lock remains in place! Plug the key back into the lock to remove. Easy! With this neat little device, system administrators can physically prevent users from connecting Pen Drives, Mobile Phones and other USB Mass Storage Devices to their computers to copy data and introduce viruses. Please note: this key is only compatible with the corresponding colour of port blocker. This product is also available in other colours and configurations: Green – 40438  10 Pack Orange – 40440  10 Pack Blue –  40466  10 Pack Pink –  40437  10 Pack Green –  40426  4 Pack + Key Pink – 40425  4 Pack + Key Blue – 40465  4 Pack + Key White – 40427  4 Pack + Key Orange  – 40428  4 Pack + Key