Metal Security Seals are used to mechanically secure a variety of heavy duty applications. These types of metal security seals are significantly stronger than most plastic pull-tight seals and are frequently referred to as “Barrier Seals” as they are designed to provide a “barrier” for entry. They provide both security features and the ability to display evidence of tampering. Typical applications for metal seals can include shipping containers, trucks and trailers, valves and drums.