Box RTruck Lock the Patent Pending Lightning Bolt Lock Pin from Thunderbolt Locks - the ultimate solution for securing your truck roll-up door from thieves. This innovative locking device is designed to secure a roll-up door when threaded into the anchor insert from the outside of the truck. It inhibits the movement of a roller wheel, making the door virtually impossible to open. The strategic design of the locking device makes it easy to install on practically all roll-up doors and simple to operate. Plus, it's made from high-quality materials, ensuring durability and longevity. Don't settle for less - choose the Lightning Bolt Lock Pin for the ultimate protection of your truck.