Tear Away security seals offer a tamper evident solution for sealing truck trailers, containers, and various other cargo holds. Made of high-density polypropylene these security plastic seals have a breaking strength of up to 79 lbs and come laser etched with 7 digit sequential numbers. To use simply thread the end of the seal through the closure and into the area marked "enter" at the end of the seal and pull tight. They do not require additional tools like bolt or cable cutters to remove, simply pull the designated tab away from the seal to remove.