OverviewHIGH SECURITY BOLT LOCK - Tamper evident bolt locks for shipping and truck bolts, high security bolt seals for cargo containers, trucks, rail cars and trailers. These container bolt plugs are used to secure truck trailers and cargo containers. These screw plugs are designed as a single-use product. Once the bolt lock is locked, it must be removed using bolt cutters or a grinder. Each bolt lock has a unique serial number laser engraved on both the bolt shaft and locking mechanism as well as the 133 Supply logo on one end. To lock separate each end from each other. Then take each end with the serial numbers oriented at the same level and click together. For added security to prevent unauthorized entry and tamper evident, the screws are anti-rotation as well. These are metal on metal interlocks for added durability and cargo security. C-TPAT compliant and meets new design and construction standards ISO 17712:2013. The longer and wider bolt shaft head can accommodate a large variety of truck trailers, rail cars and shipping container doors. It also provides better access with bolt cutters and grinders to remove and dispose of bolts. Shipping container locks for cargo container. Metal plugs for containers or trucks. 10 Pack High Security Bolt Seals for Cargo Containers, High Security Bolt Lock, Shipping Container Locks, Metal Trailer Seals, Container Stoppers, Security Seal, Bolt Locks for Shipping Bolts, Truck Seals, Truck Seal