The MS-B7 series bolt seals are used for securing truck trailers and cargo containers. These bolt seals are designed as a one-time use product which means once the seal has been locked it must be removed by destroying the seal. Each bolt seal features a unique laser engraved serial number on both the bolt shaft and the locking mechanism. The MS-B7 series bolt seals feature an anti-spin feature which provides added security to prevent un-authorized entry and tamper evidence. These bolt seals also feature a unique metal-on-metal interlocking mechanism for added cargo security. These seals are C-TPAT compliant and meet the new design and construction standards of ISO 17712: 2013. With a longer bolt shaft and wider bolt head it accommodates a wider variety of truck trailer and cargo container doors and provides better access with bolt cutters for removal. These authentic NovaVision bolt seals have the company name NOVAVISION molded into the plastic encasing the bottom of both the bolt and lock housing.