Plastic Padlock seals offer a tamper evident solution for sealing truck trailers, containers, and various other cargo holds. They are made of high-density polypropylene with a metal wire and come pre-printed with 6 digit sequencial numbers. To use simply thread the wire hasp into the second slot of the plastic body and press the wire into the seal until it is fully engaged. Once engaged, pull back to ensure it was seated properly. Removable by wire cutters.