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About Us



Located in Green Bay, Wisconsin, Freight Defense is focused on being your single source for medium and heavy duty truck security products and industry news.  With a strong commitment to market knowledge, engineering expertise and new product development, rest assured we will protect your freight from unwanted theft.

Along with heavy truck cab locksets and keys, Freight Defense also provides trailer hasp & seal protectors, padlocks, tool & battery box latches, anti-siphon inserts, locking DEF caps, replacement locksets & keys and our soon to be released Air-Safe® air brake lock.  As the aftermarket division of heavy truck OEM supplier VSI, Freight Defense benefits from over 50 years’ experience in the trucking industry. Our ability to design and assemble products in-house ensures we fully control the quality of our products, and we can offer unique security hardware solutions tailored to your specific needs. For more information regarding our products or information on a customized security solution, please contact us at (855) 935-9999 or


VSI, Freight Defense's parent company, has been an industry leader in lock and key services for over 50 years.  VSI was founded in 1948 offering lock and key services in the locksmith industry.  In 1989, VSI began production for automotive and truck locks.   By the end of 2004, VSI became the primary supplier of vehicle locks to the North American Heavy Truck Market. 

Today, VSI designs, produces and sells locks and truck security products to all major domestic truck manufacturers and their international affiliates for production and aftermarket.  VSI also supports truck fleets with key fulfillment, the Seal Safe hasp and seal protector, and the Diesel Defender anti-siphon product.  VSI also supports manufacturers of construction equipment, tool boxes, handles, and latches.  To learn more about VSI, please visit

  In 2011, VSI acquired Pop & Lock LLC, the global leader of automotive manual and powered tailgate locks.  Please visit to view our complete pickup truck security product offering and to learn more about Pop & Lock LLC.