Prevent people interfering with SD ports¦Physically blocks access to a SD card slots¦Consists of 10 locks (without key)¦Each key only works with a lock of the same colour¦Also available as a pack of 4 with 1 key¦With this neat little device, system administrators can physically prevent users from inserting SD cards and other SD Devices to their computers to copy data, introduce viruses etc.¦The SD Port Blocker is made up of a combined 'key' and 'lock' assembly which plugs into the SD Card. To use, simply plug the 'keylock' into the card slot and release the latch - the lock remains in place! Plug the key back into the lock to remove.¦Note - These Blockers are only affective with recessed SD ports.