security tags are "nice to have" cable ties would work equally as well, but these were cheaper. so, no brainer.
These are good if you are wanting to close the lids while transporting your boxes. Other than that, they are in my opinion not necessary as the lids clip closed.
Great seals for the above boxes.
Great little accessory for security to go with the upcycled boxes.
Not used yet.
Zip locks great idea to secure boxes when moving.