Our durable, high security Flat Head Metal Truck door seals are easy to install, they require no tools to lock, but must be cut for removal. These tamper evident seals are normally use to secure cargo while in transit or in storage. Other uses are shipping containers, fire extinguishers, sprinkler systems, storage bins, rail freight, truck doors, utility meters, valves, tankers. Its double wire locking barb mechanism provide tamper resistance. Seven-digit sequential numbering provide additional security and traceability.